5x – 4 + 2x = 3x + 8 + 7x
solve these equations
11x-10y=1000
15y-5z-8x=0
3z-y=40
400 = 3x - 20
5x = 40
2 x³ + 4 x² + 6x
-7(6+2x)=8(-6-4x)
27000/5000= (1+r/4)^24
x( $\frac{4}{5}$)
a/5 + 3 = 8
cosh^2(kx-wt)