Question

6,7y+13+3,1y=86,5
2,8+K+3,7=12,5
(5,6-y)+3,8=4,4

Answer 1

6.7у+13+3.1у=86.5
6.7у+3.1у=86.5-13
9.8у=73.5
у=73.5:9.8
у=7.5

2.8+к+3.7=12.5
к=12.5-2.8-3.7
к=6

(5.6-у)+3.8=4.4
5.6-у=4.4-3.8
5.6-у=0.6
у=5.6-0.6
у=5

Answer 2

6.7y+3.1y=86.5-13
9.8y=73.5
y=7.5

k=12.5-2.8-3.7
k=6

5.6-y+3.8=4.4
-y=4.4-5.6-3.8
-y=-5
y=5