the answer -7+x=13 add 7 to both sides. cancel the first set of sevens leavening you with the x and add 13+7=20
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-7+x=13x the -7=12x and x =-7/12
In the equation 3x plus 7 equals 13, x is equal to 2.
-6
3 x 2 + x = -7 >> 6 + X = -7 >>> x = -13
If: 3x-7 = 5x+13 Then: x = -10