7a-3(a+1)=

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

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

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

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

Combine like terms: 7a + -3a = 4a
-3 + 4a = 0

Solving
-3 + 4a = 0

Solving for variable 'a'.

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

Add '3' to each side of the equation.
-3 + 3 + 4a = 0 + 3

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

Combine like terms: 0 + 3 = 3
4a = 3

Divide each side by '4'.
a = 0.75

Simplifying
a = 0.75