Question

12y+3=y-7      5x+2x+5=4x

Answer 1

12y+3=y-7
12y-y=-7-3
11y=-10
y=-10:11
y= - 1 111

5x+2x+5=4x
5x+2X-4x=-5
3x=-5
x=-5:3
x=5/3= - 1 23

Answer 2

12y+3=y-7
12у-у=-7-3
11у=-10
у=-1,1

5x+2x+5=4x
5x+2x-4х=-5
3х=-5
х=-0,6