Question

3,4 + 2y = 7 (y - 2,3)

Answer 1

3.4+2y-7y+16,1=0
-5y=-19.5
5y=19,5
y=19,5/5
y=3.9

Answer 2

3,4+2y=7(y-2,3)
3,4+2y=7y-16,1
2y-7y=-16,1-3,4
-5y=-19,5
y=-19,5:(-5)
y=3,9