0.5y+0.9(y+4)=0.3(12)

Solution for 0.5y+0.9(y+4)=0.3(12) equation:

Simplifying
0.5y + 0.9(y + 4) = 0.3(12)

Reorder the terms:
0.5y + 0.9(4 + y) = 0.3(12)
0.5y + (4 * 0.9 + y * 0.9) = 0.3(12)
0.5y + (3.6 + 0.9y) = 0.3(12)

Reorder the terms:
3.6 + 0.5y + 0.9y = 0.3(12)

Combine like terms: 0.5y + 0.9y = 1.4y
3.6 + 1.4y = 0.3(12)

Multiply 0.3 * 12
3.6 + 1.4y = 3.6

Add '-3.6' to each side of the equation.
3.6 + -3.6 + 1.4y = 3.6 + -3.6

Combine like terms: 3.6 + -3.6 = 0.0
0.0 + 1.4y = 3.6 + -3.6
1.4y = 3.6 + -3.6

Combine like terms: 3.6 + -3.6 = 0.0
1.4y = 0.0

Solving
1.4y = 0.0

Solving for variable 'y'.

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

Divide each side by '1.4'.
y = 0

Simplifying
y = 0