What is the answer to 3(1-5/2 d)+4d=5 ?

The answer to 3(1-5/2 d)+4d=5 is d=-4/7

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3(1-5/2 d)+4d=5

3 (1 - \frac{5}{2} d) + 4 d = 5

d = - \frac{4}{7}

Decimal Notation

d = - 0.57142 \dots

Solution steps

3 (1 - \frac{5}{2} d) + 4 d = 5

Expand

3 (1 - \frac{5}{2} d) + 4 d : 3 - \frac{7}{2} d

3 - \frac{7}{2} d = 5

Multiply both sides by

2

6 - 7 d = 10

Move

6

to the right side

- 7 d = 4

Divide both sides by

- 7

d = - \frac{4}{7}

3 x + 3 x = 12

a - 2 (4 a - 5) = - 1

2 (x + 3) = 0

11 x + 1 = - 1 + x

\frac{2}{7} (4 m - 18) = 12