5(a+9)=7(a-5)

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Solution for 5(a+9)=7(a-5) equation:


Simplifying
5(a + 9) = 7(a + -5)

Reorder the terms:
5(9 + a) = 7(a + -5)
(9 * 5 + a * 5) = 7(a + -5)
(45 + 5a) = 7(a + -5)

Reorder the terms:
45 + 5a = 7(-5 + a)
45 + 5a = (-5 * 7 + a * 7)
45 + 5a = (-35 + 7a)

Solving
45 + 5a = -35 + 7a

Solving for variable 'a'.

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

Add '-7a' to each side of the equation.
45 + 5a + -7a = -35 + 7a + -7a

Combine like terms: 5a + -7a = -2a
45 + -2a = -35 + 7a + -7a

Combine like terms: 7a + -7a = 0
45 + -2a = -35 + 0
45 + -2a = -35

Add '-45' to each side of the equation.
45 + -45 + -2a = -35 + -45

Combine like terms: 45 + -45 = 0
0 + -2a = -35 + -45
-2a = -35 + -45

Combine like terms: -35 + -45 = -80
-2a = -80

Divide each side by '-2'.
a = 40

Simplifying
a = 40

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