What is the answer to a-2(4a-5)=-1 ?

The answer to a-2(4a-5)=-1 is a= 11/7

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

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

a = \frac{11}{7}

Decimal Notation

a = 1.57142 \dots

Solution steps

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

Expand

- 2 (4 a - 5) : - 8 a + 10

a - 8 a + 10 = - 1

Add similar elements:

a - 8 a = - 7 a

- 7 a + 10 = - 1

Move

10

to the right side

- 7 a = - 11

Divide both sides by

- 7

a = \frac{11}{7}

2 (x + 3) = 0

11 x + 1 = - 1 + x

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

\frac{1}{2} x - 12 = 4

- 108 = - 3 (- 5 x + 1)