Answer:
x=17
Step-by-step explanation:
7x+10+3×=180
10x+10=180
-10. -10
10x/10=170/10
0.04
6.32
6^2 - 2^2
✓40
=6.32455532
2d.p = 6.32
y=7
6/42 =1/y
y=42/6=7