Question

решите уравнение х+58/31=186, 2+180/х-11=22, 2х-168/15-12=58

Answer 1

1) х=186-58/31=186-1 (27/31)=185 (31/31)-1 (27/31)=184 (4/31) 2) 2+180/х-11=22, 180/х=22+11-2, 180/х=31, х=180/31=5(27/31), 3) 2х-168/15-12=58, 2х=58+12+168/15, 2х=70+11 (1/5), 2х=81(1/5), х=406/5:2, х=406/10, х=40,6

Answer 2

31х=5766-58=5708/÷31
х=184,13

(х-11)×2 + 180= 22
2х=22-180+22
2х=-136
х=-68

2х×15 - 168- 12×15 = 58×15
30х - 180=870
30х=1050
х=35