Answer:
y=4 y=7 y=10 y=13 y=16
Step-by-step explanation:
20a + 158+6c=you will expand the brackets
= so it is 120+60+48
20a+158+6c=120+60+48
20a+ 6c=120+60+48-158
20a+6c=70
20a divide by 20+6c divide by 6 on both side
a + c = 0.58
I got 7.1 x 10^(-11) but it's been a few years so I could've done it wrong
