Question

Нужно ришыть ето все

Answer 1

Ответ:

$3 {a}^{2} + 4b = 3 \times {3}^{2} + 4 \times 1 = 3 \times 9 + 4 = 27 + 4 = 31$

$8x + 2x + 9 = 8 \times 13 + 2 \times 13 + 9 = 104 + 26 + 9 = 139$

$x + x + 2x + 6x = 17120 \\ 10x = 17120 \\ x = 17120 \div 10 \\ x = 1712$

$(942 - a) - 126 = 254 \\ 942 - a = 254 + 126 \\ 942 - a = 380 \\ - a = 380 - 942 \\ - a = - 562 \\ a = 562$