X+11=6 (×-19)
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7 (× + 10)-8 (× + 8)=0
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6 (× - 3)-9 (× - 5)=× - 1
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7 (× + 10)-8 (× + 8)=0
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6 (× - 3)-9 (× - 5)=× - 1
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-6x+x= -114-11
-5x= -125
x=-125/-5
x= +25
b) 7x+70-8x-64=0
-1x+6=0
x= -6/-1
x= 6
c)6x-18-9x+45=x-1
-3x+27=x-1
-3x-x=-1-27
-4x= -28
x= -28/-4
x=7