Question

a) 70 - 5 . ( x - 3 ) = 45

b) 10 + 2 . x = 4⁵ : 4³

Answer 1

a)70-5(x-3)=45

<=>70-5x+15=45

<=>-5x=45-70-15

<=>-5x=-40

<=>x=8

b)10+2x=4⁵:4³

<=>10+2x=16

<=>2x=16-10

<=>2x=6

<=>x=3

Answer 2

a, 70 - 5(x-3) = 45

5(x-3) = 70 - 45 = 30

x-3 = 30 : 5 = 6

x=6+3

x=9

10 + 2x = 4⁵ : 4³ = 4²=16

2x = 16 - 10 

2x = 6

x = 6:2

x=3

Answer 3

a, 70 -5.(x-3) =45

 5.(x-3) = 70 -45

 5.(x-3)= 25

 x-3 = 25:5

x-3 =5

x= 5+3

x=8

b,10+2x=4^5:4^3 

10+2x=4^2

10+2x=16

2x=16-10

2x=6

x=6:2

x=3