Solve the equation 0.4z−31.5z+9 = −75
By cross multiplying, we have
5(0.4z - 3) = -7 (1.5z + 9)
2z -15 = -10.5z - 63
12.5z = -48
z = −4812.5 = −9625
7x/4=3/5 solve equation
3(5z-7)-2(9z-11)=4(8z-13)-17
Solve this equation.