Question

rezolvati in R ecuatia
e)3(2x+7)=9
f)2(2-x)=x-5
g)-4(x-2)=-6
h)-2la puterea 2 +3(x+5)=x+8

Answer 1

a)3(2x+7)=9
6x+21=9
6x=9-21
6x=-22
x=-22supra 6
x=-11supra 3

b)2(2-x)=x-5
4-2x=x-5
-2x-x=-5-4
-3x=-9
x=-9 supra -3
x=3

-4(x-2)=-6
-4x+8=-6
-4x=-6-8
-4x=-14
x=-14 supra -4,apoi simplifici cu 2
x= -7supra -2

(-2)la puterea 2 +3(x+5)=x+8
4+3x+15=x+8
3x-x=8-15-4
2x=-11
x=-11 supra 2