Question

Rozwiąż równania:
a)10= 4 - 2x
b) -(2x-1) = 4
c) 2(x + 1 ) = x
d) 2t - (3t + 1 ) = 6
e) -(4 + x) = 2(3 -x)
f) 3(y+6) - y = 2( y + 9 )
i) (x-7) - 2(3x+ 5 ) = 3

ile umiecie najwięcej daje naj

Answer 1

A)2x=4-10
2x=-6|:2
x=-3
b)-2x+1=4
-2x=4-1
-2x=3|:(-2)
x=- 1 1/2
x=-1,5
c)2x+2=x
2x-x=-2
x=-2
d)2t-3t-1=6
2t-3t=6+1
-t=5|:(-1)
t=-5

Answer 2

A) 10 = 4 - 2x
-2x = 10 - 4
-2x = -6
x = 3
b) -(2x - 1) = 4
-2x + 1 = 4
-2x = 4 - 1
-2x = 3
x = -1½
c) 2(x + 1) = x
2x + 2 = x
x = -2
d) 2t - (3t + 1) = 6
2t - 3t - 1 = 6
-t = 6 -1
-t = 5
t = -5
e) -(4 + x) = 2(3 - x)
-4 - x = 6 - 2x
-x + 2x = 6 + 4
x = 10
f) 3(y + 6) - y = 2(y + 9)
3y + 18 - y = 2y + 18
2y = 2y
0 = 0
i) (x - 7) - 2(3x + 5) = 3
x - 7 - 6x - 10 = 3
-5x = 3 + 17
-5x = 20
x = -4

Answer 3

B)-2x+1=4
-2x=4-1
-2x=3/:(-2)
x= -1,5

c)2x+2=x
2x-x=-2
x=-2

d)2t-3t-1=6
-t=6+1
-t=7/:(-1)
t=-7

e)-4-x=6-2x
-x+2x=6+4
x=10

f)3y+18-y=2y+18
3y+18y-2y=18
19y=18/:19
y=18/19

CHYBA