-y + y equals 0.
72 i guess!
You cannot solve x plus y since that is an expression, not an equation (nor inequality).
b = y - mx.
You cannot. y-3 + y-3 + y-3 +y-3 = 4y-12 is an expression, not an equation. An expression cannot be solved since there is nothing to solve.
y= -2x
y=5-x
Set it equal to 0 and subtract x and solve for y
y + y + 2 = 182y + 2 = 182y = 16y = 8whew !
5+y+2y? = 5+3y?
2y + 7x + y-1?
Y=0.5 and X=1