7/8+x=11/36 3/5умножить x=28/45 4/7:x=7/12

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вопрос

To solve these equations for x, we need to isolate the variable x.

1) 7/8 + x = 11/36

Subtract 7/8 from both sides:
x = 11/36 - 7/8
Find a common denominator for 36 and 8, which is 72:
x = 22/72 - 63/72
x = -41/72

2) 3/5 * x = 28/45

Multiply both sides by the reciprocal of 3/5, which is 5/3:
x = 28/45 * 5/3
x = 140/135
Simplify the fraction by dividing both numerator and denominator by 5:
x = 28/27

3) 4/7 ÷ x = 7/12

Multiply both sides by x:
4/7 = 7/12 x
Divide both sides by 7/12, which is the same as multiplying by 12/7:
4/7 12/7 = x
x = 48/49