Question

a)-3(x+1)9+x

b)3(x+2)=4-2x

c)-2(x+1)8-x

d)4x+5=-7+x

e)-x+4=2x+8

f)-2x+7=3x-2

Answer 1

a)
-3(x+1)=9+x
-3x - 3 = 9 + x
-3x - x = 9 + 3
-4x = 12   /:(-4)
x = -3

b)
3(x+2)=4-2x
3x + 6 = 4 - 2x
3x + 2x = 4 - 6
5x = -2    /:5
x = -0,4

c)
-2(x+1)=8-x
-2x - 2 = 8 - x
-2x + x = 8 + 2
-x = 10     /:(-1)
x = -10

d)
4x+5=-7+x
4x - x = -7 - 5
3x = -12    /:3  
x = -4

e)
-x+4=2x+8
-x - 2x = 8 - 4
-3x = 4     /:(-3)
x = -4/3

f)
-2x+7=3x-2
-2x - 3x = -2 - 7
-5x = -9     /:(-5)
x = 1,8