Solving for y implies that there is an equation that needs to be rearranged to isolate y from all other variables and numbers. But there is no equation here.
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b = y - mx.
y-b/x=m
40 + 60 = 60 + x Addition has a property called the Commutative property which says that: x + y = y + x. So, over here: x = 40 y = 60 Thus, 40 + 60 = 60 + 40
y = mx + b y - mx = b
4x-5y = -8 4x+40 = y => y = 4x+40 Substitute the value of y into the top equation: 4x-5(4x+40) = -8 4x-20x-200 = -8 4x-20x = 200-8 -16x = 192 Divide both sides by -16 to find the value of x: x = -12 Substitute the value of x into the original equations to find the value of y: Therefore: x = -12 and y = -8