12x -15=3 х-6
12х-3х=15-6
9х=9
х=1
3(4x-5)=3x-6
12x-15=3x-6
12x-3x=15-6
9x=9
x=1
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12x -15=3 х-6
12х-3х=15-6
9х=9
х=1
3(4x-5)=3x-6
12x-15=3x-6
12x-3x=15-6
9x=9
x=1