Question

3.72 3) 4) плиз срочно​

Answer 1

Ответ:

1) x = 4; y = 2

2) x = 3; y = -2

Объяснение:

$1) 0,5x = -0,3x + 3,2;\\\\0,8x = 3,2;\\\\x = 4;\\\\y= 0,5x = 2$

$2) -\frac{4}{3}x + 2 = 3x - 11;\\\\-\frac{4}{3}x - 3x = -11 - 2;\\\\-\frac{4}{3} x - \frac{9}{3} x = -13;\\\\-\frac{13}{3} x = -13;\\\\\frac{13}{3}x = 13;\\\\x = 13 : \frac{13}{3};\\\\x = \frac{13*3}{13};\\\\x = 3;\\\\y = 3x - 11 = 9 - 11 = -2$