Question

Ułóż,rozwiąż i sprawdż 5 równań z nawiasami.Proszę daje Najlepsze:P

Answer 1

a)

4(x+1)-x=-5
4x + 4 - x = -5
3x = -5 - 4
3x = -9
x = -3
spr. 4(-3 + 1) - (-3) = 4 * (-2) + 3 = -8 + 3 = -5

b)

x-7-2(3x+5)=13
x - 7 - 6x - 10 = 13
-5x = 13 + 10 + 7
-5x = 30
x = -6
spr. -6 - 7 -2(-18 + 5) = -13 - 2 * (-13) = -13 + 26 = 13

c)

-3(x+1)-x=9
-3x - 3 - x = 9
-4x = 9 + 3
-4x = 12
x = -3
spr.  -3(-3 + 1) - (-3) = -3 * (-2) + 3 = 6 + 3 = 9

d)

4(2x+3)-5x=-3
8x + 12 - 5x = -3
3x = -3 - 12
3x = -15
x = -5
spr. 4(-10 + 3) - 5 * (-5) = 4 *(-7) + 25 = -28 + 25 = -3

e)

2(x+1)+5x=16
2x + 2 + 5x = 16
7x = 16 - 2
7x = 14
x = 2
spr. 2(2 + 1) + 5 * 2 = 2 * 3 + 10 = 6 + 10 = 16