You plot the equation as a graph. Every one of the infinitely many points on the graph is a solution.
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2y = 4 (divide both sides by 2 to solve) y = 2
t=-4
a = 4
-4x-4 equals -16. Add 4 to both sides; -4x equals -12. Divide both sides by -4; x equals 3.
x=4From superscot85: How you solve it is to subtract 4 from each side leaving x = 4