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-5x=-9-1
-5x=-10 | :(-5)
x= 2
6x+7=1-5x
6x+5x=-7+1
11x=-6 |:11
x= -11/6
-5x=-10 /: (-5)
X=2
6x+7=1-5x
11x=-6 /:11
x= - ⁶/₁₁
1-5×9=1-45=-44