-37-a=3(a-7)

Solution for -37-a=3(a-7) equation:

Simplifying
-37 + -1a = 3(a + -7)

Reorder the terms:
-37 + -1a = 3(-7 + a)
-37 + -1a = (-7 * 3 + a * 3)
-37 + -1a = (-21 + 3a)

Solving
-37 + -1a = -21 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
-37 + -1a + -3a = -21 + 3a + -3a

Combine like terms: -1a + -3a = -4a
-37 + -4a = -21 + 3a + -3a

Combine like terms: 3a + -3a = 0
-37 + -4a = -21 + 0
-37 + -4a = -21

Add '37' to each side of the equation.
-37 + 37 + -4a = -21 + 37

Combine like terms: -37 + 37 = 0
0 + -4a = -21 + 37
-4a = -21 + 37

Combine like terms: -21 + 37 = 16
-4a = 16

Divide each side by '-4'.
a = -4

Simplifying
a = -4