1) 3*х+15=43*2-23 2) 3*х+70=350:2 3) (16*х-52) * 3=180 4) (13*х-63) : 6+86=95

Найдем корни уравнений.

1) 3 * х + 15 = 43 * 2 - 23;

3 * x + 15 = 86 - 23;

3 * x + 15 = 63;

3 * x = 63 - 15;

3 * x = 48;

x = 48/3;

x = 16.

2) 3 * х + 70 = 350/2;

3 * x + 70 = 175;

3 * x = 175 - 70;

3 * x = 105;

x = 105/3;

x = 35.

3) (16 * х - 52) * 3 = 180;

16 * x - 52 = 180/3;

16 * x - 52 = 60;

16 * x = 60 + 52;

16 * x = 112;

x = 112/16;

x = 56/8;

x = 7.

4) (13 * х - 63) / 6 + 86 = 95;

(13 * x - 63) / 6 = 95 - 86;

(13 * x - 63) / 6 = 9;

13 * x - 63 = 6 * 9;

13 * x = 63 + 63;

13 * x = 2 * 63;

x = 2 * 63/13;

x = 126/13.