7 + 4z = 437 + 4z -7 = 43 - 7
4z = 43 - 7
4z = 36
z = 9
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I used the matrix method to find the answer: x=4, y=-7, z=-5.
This is not an inequality. This is an equation.12x+7=43 12x=36 x=3
(7z - 4)(4z - 7) so z = 4/7 or 7/4
Since 2 plus 4 is not 10, the "if" statement is false. Given a false "if", logically, 9 + 2 can equal anything you like.