(15Х-22Х):19=2 85+48:(11-Х)=91 86-49:(2Х-5)=79

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вопрос

To solve the given equations:

1) (15X - 22X) / 19 = 2

Combine the X terms: -7X / 19 = 2
Multiply both sides by 19 to isolate X: -7X = 38
Divide by -7 to solve for X: X = -38 / 7 = -5.43 (rounded to two decimal places)

2) 85 + 48 / (11 - X) = 91

Subtract 85 from both sides: 48 / (11 - X) = 6
Multiply both sides by (11 - X): 48 = 6(11 - X)
Expand: 48 = 66 - 6X
Subtract 66 from both sides: -18 = -6X
Divide by -6 to solve for X: X = 18 / 6 = 3

3) 86 - 49 / (2X - 5) = 79

Subtract 86 from both sides: -49 / (2X - 5) = -7
Multiply both sides by (2X - 5): -49 = -7(2X - 5)
Expand: -49 = -14X + 35
Subtract 35 from both sides: -84 = -14X
Divide by -14 to solve for X: X = 84 / 14 = 6

Therefore, the solutions to the equations are:
1) X = -5.43
2) X = 3
3) X = 6