2 over 3 = 18 over x+5...
x=22 because (x+5) needs to equal 27 for the equation to be true.
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-86
That equation has no solution. There is no possible number that's equal to 18 more than itself.
a + 18 = 90 is a linear equation in one variable. Adding both sides by -18, we get a + 18 - 18 = 90 - 18 a = 90 - 18 = 72
11x = 20x +1811x-20x=18x(11-20)=18-9x=18x=-2
x = -1 Since -3(-1) + 15 = 18