Question

3:(4х+5)=39 -15.(х+6)=120

Answer 1

3:(4x+5)=39-15
3:(4x+5)=24
3:4x=24-5
3:4x=19
4x=19·3
4x=57
x=57:4
x=14.25
(x+6)=120
x=120-6
x=114

Answer 2

a)3:(4x+5)=39⇒4x+5=39×3⇒4x+5=117⇒4x=117-5⇒4x=112⇒x=112|4⇒x=28

b)-15×(x+6)=120⇒-15x-90=120⇒-15x=120+90⇒-15x=210⇒x=210|-15⇒x=-14
succes