There is no equation (nor inequality) to be solved!
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well you should start with 9z + 10 = 145 then balance the equation by collecting like terms 9z = 145 - 10 solve 9z = 135 then divide both sides by the number next to the variable. (in this case 9) so 9z/9 = 135/9 solve z = 15
8x + 9z
9z-5z = 30+z 3z = 30 z = 10
9z+8 = 3z-10 9z-3z = -10-8 6z = -18 z = -3
9z