Question

помогите ,!!!!! задание
"решить уравнения"​ 12 баллов дам!!!

Answer 1

в)

$7x + 2 - 3x + 10 = 0 \\ 4x + 12 = 0 \\ 4x = - 12 \\ x = - 3$

е)

$5x - 2 \frac{1}{4} = \frac{1}{2} x \\ 5x - 2 \frac{1}{4} - \frac{1}{2} x = 0$

$4 \frac{1}{2}x - 2 \frac{1}{4} = 0 \\ 4 \frac{1}{2} x = 2 \frac{1}{4}$

$x = 2 \frac{1}{4} \div 4 \frac{1}{2} = \frac{9}{4} \div \frac{9}{2} = \frac{9}{4} \times \frac{2}{9} = \\ x = \frac{1}{2} = 0.5$