-5
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x-15=20
(transfer 15 to the other side, beside 20, and change the minus sign to add sign)
x=20+15
(and then, add the 20 and 15)
x=35 <---- this is the answer
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CHECK:
35-15=x
35
-
15
______
20
Improved Answer:-
x = -5
X=5
7+x=15 x=8
If: 2x-3y = -15 and x = 4y Then: x = -12 and y = -3
If: 15x = 360 then x equals 360/15 = 24
If 40 plus x equals 25 then x is equal to -15.