3a+(2a-7)-(a-1)=

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Solution for 3a+(2a-7)-(a-1)= equation:


Simplifying
3a + (2a + -7) + -1(a + -1) = 0

Reorder the terms:
3a + (-7 + 2a) + -1(a + -1) = 0

Remove parenthesis around (-7 + 2a)
3a + -7 + 2a + -1(a + -1) = 0

Reorder the terms:
3a + -7 + 2a + -1(-1 + a) = 0
3a + -7 + 2a + (-1 * -1 + a * -1) = 0
3a + -7 + 2a + (1 + -1a) = 0

Reorder the terms:
-7 + 1 + 3a + 2a + -1a = 0

Combine like terms: -7 + 1 = -6
-6 + 3a + 2a + -1a = 0

Combine like terms: 3a + 2a = 5a
-6 + 5a + -1a = 0

Combine like terms: 5a + -1a = 4a
-6 + 4a = 0

Solving
-6 + 4a = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '6' to each side of the equation.
-6 + 6 + 4a = 0 + 6

Combine like terms: -6 + 6 = 0
0 + 4a = 0 + 6
4a = 0 + 6

Combine like terms: 0 + 6 = 6
4a = 6

Divide each side by '4'.
a = 1.5

Simplifying
a = 1.5

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