Question

3х(х+1)-2х(5х+3)=7х(2-х)+34

Answer 1

Ответ:

${3x}^{2} + 3x - {10x}^{2} - 6x = 14x - {7x}^{2} + 34 \\ { - 7x}^{2} - 3x = 14x - {7x}^{2} + 34 \\ { - 7x}^{2} - 3x - 14x + {7x}^{2} - 34 = 0 \\ - 17x = 34 \\ x = - 2$