Answer:
10.
5x+23=8x-19
23+19=8x-5x
3x=42
x=42/3
x=14
11.
14x-13=8x+5
14x-8x=13+5
6x=18
x=18/6
x=3
.12.
4x+7=10x-41
10x-4x=41+7
6x=48
x=48/6
x=8
so
h=10×8-41=39
b=17
p=SV
By using Pythagoras law
p²+b²=h²
SV²=39²-17²
SV²=1232
SV=√1232
SV=35.09=35
