Question

calcule y na equacao 4x-5y=3500 sabendo que x=y-200

Answer 1

4x-5y=3500
4(y-200)-5y=3500
4y-800-5y=3500
4y-5y=3500+800
-y=4300.(-1)
y=-4300

Answer 2

4x - 5y = 3500
4(y - 200 ) - 5y = 3500
4y - 800 -5y = 3500
4y - 5y = 3500 + 800
-y =4300 *(-1)
y = -4300