Rozwiaz rownanie i napisz sprawdzenie.1) 11(4-6y) + 5(13y + 1) = 92) 4x - 7x + 12 = 6(2x + 4)3) 2x +.... Question from @CarlieCullen

krysta $1)\\ \\ 11(4-6y) + 5(13y + 1) = 9\\ \\44 -66y+65y+5=9\\ \\-y=9-44 -5\\ \\-y=-40/*(-1)\\ \\y=40$

$spr.\\ \\11(4-6*40) + 5(13*40 + 1) = 9\\ \\11*(4-240)+5(520+1)=9\\ \\11*(-236) +5*521=9\\ \\-2596+2605=9\\ \\9=9\\ \\L=P$

$2)\\ \\4x - 7x + 12 = 6(2x + 4)\\ \\4x - 7x + 12 = 12x +24\\ \\4x - 7x -12x =24-12\\ \\-15x = 12/:(-15)\\ \\x=-\frac{12}{15}\\ \\x=-\frac{4}{5}$

$spr.\\ \\ 4*(-\frac{4}{5}) - 7*(-\frac{4}{5}) + 12 = 6*(2*(-\frac{4}{5}) + 4)\\ \\-\frac{16}{5}+\frac{28}{5}+12=6*(-\frac{8}{5}+4)\\ \\\frac{12}{5}+12=6*(-\frac{8}{5}+4)\\ \\\=2\frac{2}{5}+12=6*(-1\frac{3}{5}+4)$

$14\frac{2}{5}=6*2\frac{2}{5}\\ \\14\frac{2}{5}=6*\frac{12}{5}\\ \\14\frac{2}{5}=\frac{72}{5}\\ \\14\frac{2}{5}=14\frac{2}{5}\\ \\L=P$

$3)\\ \\ 2x + 3(4x + 1) = 10(6x - 8) + 15\\ \\2x + 12x +3 = 60x - 80 + 15\\ \\2x + 12x -60x =- 80 -3+ 15\\ \\-46x = -68/:(-46)$

$x=\frac{68}{46}\\ \\x=\frac{34}{23}\\ \\x=1\frac{9}{23}$

$2*\frac{34}{23} + 3*(4*\frac{34}{23}+ 1) = 10*(6*\frac{34}{23}- 8) + 15\\ \\\frac{68}{23} + 3*(\frac{136}{23}+ \frac{23}{23}) = 10*(\frac{204}{23}- \frac{184}{23}) + 15\\ \\\frac{68}{23} + 3*\frac{159}{23} = 10*\frac{20}{23}+ 15\\ \\\frac{68}{23} + \frac{477}{23} = \frac{200}{23}+ 15\\ \\ \frac{545}{23} = \frac{200}{23}+ \frac{345 }{23}$

$\frac{545}{23} = \frac{545}{23}\\ \\L=P$

1 votes Thanks 1

CarlieCullen A sprawdzenie?

krysta ok nie zauważyłam

CarlieCullen i jak Ci idzie?

krysta zrobione :)

basetla 1.
11(4 - 6y) + 5(13y + 1) = 9
44 - 66y + 65y + 5 = 9
-y = -40 /:(-1)
y = 40

Spr.
L 11(4 - 6 * 40) + 5(13 * 40 + 1) = 11(4 - 249) + 5(520 + 1) = 2=11(-236)+ 5 * 521 =
= -2596 +b2605 = 9
P = 9
L = P

2.
4x - 7x + 12 = 6(2x + 4)
-3x + 12 = 12x + 24
-15x = 12 /:(-15)
x = -4/5

Spr.
L = 4(-4/4) - 7(-4/5) + 12 = -16/5 + 28/5 + 12 = 12/5 + 12 = 2 2/5 + 12 = 14 i 2/5
P = 6[2(-8/5 + 4]=6(-8/5 + 20/5) = 6 * 12/5 = 72/5 = 14 i 2/5
L = P

3.
2x + 3(4x + 1) = 10(6x - 8) + 15
2x + 12x + 3 = 60x - 80 + 15
14x - 60x = -65 - 3
- 46x = -68 /:(-46)
x = 1 i 11/23

Spr.
L = 2 * 34/23 + 3(4 * 34/23 + 1) = 68/23 + 3(128/23 + 23/23) = 68/23 + 3 * 159/23 =
= 288/23 + 64/23 = 545/23
P = 10 * (6 * 24/23 - 8) + 15 = 10(204/23 - 184/23) + 15 = 10 * 20/3 + 15 =
= 200/23 + 345/23 - 545/23 = 545/23
L = P

0 votes Thanks 0

Rozwiaz rownania:1) 2(3x - 4) = 6x + 102) 4x - 7x + 12 = 6(2x + 4)3) 2x + 3(4x + 1) = 10(6x - 8) + 15

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