Question

19×(39-2x)=703 2(2x+3x)=20 12(x+9x)=1200

Answer 1

19.(39-2x)=703     /:19
39-2x=37
2x=39-37
2x=2
x=1
=======
2(2x+3x)=20
2.5x=20      
10x=20   /:10
x=2
========
12(x+9x)=1200
12.10x=1200    /:12
10x=100   /:10
x=10
=========

Answer 2

1
39-2х=703:19
39-2x=37
2x=39-37
2x=2
x=1
2
10x=20
x=2
3
120x=1200
x=10