Question

a) 3×-5+2×+9=7×+7-2


b)2×-4+10×-×=7+2×-1


c)2(×-1)=4


d)5(2×+3)=0

Answer 1

desculpe mas n sei responder

Answer 2

a) 3x - 5 + 2x + 9 = 7x + 7 - 2
3x + 2x - 7x = 7 - 2 + 5 - 9
-2x = 1
x = 1/-2

b) 2x - 4 + 10x - x = 7 + 2x - 1
2x + 10x - x - 2x = 7 - 1 + 4
9x = 10
x = 10/9

c) 2 (x-1) = 4
2x - 2 = 4
2x = 4+ 2
2x = 6
x = 6/2
x = 3

d) 5 (2x + 3) = 0
10x + 15 = 0
10x = -15
x = -15/10
x = -3/2