Question

a) 2a - 4 = 7 b) 4 + 12a = 40 c) 4 ( x + 3 ) = 20 d) 5 + 3/2x = -1 e)

Answer 1

a)2a-4=7

2a=7+4

2a=11

a=11/2=5.5

b)12a=40-4

12a=36

a=3

c)4(x+3)=20

4x+12=20

4x=20-12

4x=8

x=8/4=2

d)5+3/2x=-1

3/2x=-1+5

3/2x=4

3=4×2x

3=8x

x=3/8

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