x=7
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172=x
x = -1.2, y = -3
5x/6 = -9/6Multiply both sides of the equation by 6:5x = -9Divide both sides by 5:x = -9/5
5x-9Substitute 4 in for x5(4)-9=Solve.9-9=0the answer is zero.The answer is not zero you added when you were supposed to multiply so the real answer is 11.
7X-1=9+5X. add 1 to both sides 7X=10+5X. Subtract 5X and get 2X=10 divide by 2 and x=5