7x+2y=71
3x+2y=35
6x+7y=10
9x+13y=-5
8y+7x=30
8y+3x=14
make x the subject from y = x^2-2x
379749833583241 x 19487171
437400 {1-10/100}
7x+5y=8
3x-2y=-9
712-218
C/2+C/4-3=2
5.2/x=y
y*0.15=3.6
