Ответ:
- \(7x-4=6+2x\)
\(7x-2x=6+4\)
\(5x=10\)
\(x=2\). - \(2(3x-4)-7=4x-3(x-5)\)
\(6x-8-7=4x-3x+15\)
\(6x-15=x+15\)
\(5x=30\)
\(x=6\). - \(5x+3(x-1)=6x+17\)
\(5x+3x-3=6x+17\)
\(8x-6x=17+3\)
\(2x=20\)
\(x=10\). - \(3x-5(2-x)=54\)
\(3x-10+5x=54\)
\(8x=64\)
\(x=8\). - \(8(4-y)-3(2y+9)=15\)
\(32-8y-6y-27=15\)
\(5-14y=15\)
\(-14y=10\)
\(y=-\frac{5}{7}\). - \(3(3x-7)+2=5(1-2x)-7\)
\(9x-21+2=5-10x-7\)
\(9x-19=-10x-2\)
\(19x=17\)
\(x=\frac{17}{19}\).
Ответ: 1) \(x=2\); 2) \(x=6\); 3) \(x=10\); 4) \(x=8\); 5) \(y=-\frac{5}{7}\); 6) \(x=\frac{17}{19}\).
