0.6-0.7(2a+3)=4

Solution for 0.6-0.7(2a+3)=4 equation:

Simplifying
0.6 + -0.7(2a + 3) = 4

Reorder the terms:
0.6 + -0.7(3 + 2a) = 4
0.6 + (3 * -0.7 + 2a * -0.7) = 4
0.6 + (-2.1 + -1.4a) = 4

Combine like terms: 0.6 + -2.1 = -1.5
-1.5 + -1.4a = 4

Solving
-1.5 + -1.4a = 4

Solving for variable 'a'.

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

Add '1.5' to each side of the equation.
-1.5 + 1.5 + -1.4a = 4 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + -1.4a = 4 + 1.5
-1.4a = 4 + 1.5

Combine like terms: 4 + 1.5 = 5.5
-1.4a = 5.5

Divide each side by '-1.4'.
a = -3.928571429

Simplifying
a = -3.928571429