0.3(4)+x=0.4(4+x)

Solution for 0.3(4)+x=0.4(4+x) equation:

Simplifying
0.3(4) + x = 0.4(4 + x)

Multiply 0.3 * 4
1.2 + x = 0.4(4 + x)
1.2 + x = (4 * 0.4 + x * 0.4)
1.2 + x = (1.6 + 0.4x)

Solving
1.2 + x = 1.6 + 0.4x

Solving for variable 'x'.

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

Add '-0.4x' to each side of the equation.
1.2 + x + -0.4x = 1.6 + 0.4x + -0.4x

Combine like terms: x + -0.4x = 0.6x
1.2 + 0.6x = 1.6 + 0.4x + -0.4x

Combine like terms: 0.4x + -0.4x = 0.0
1.2 + 0.6x = 1.6 + 0.0
1.2 + 0.6x = 1.6

Add '-1.2' to each side of the equation.
1.2 + -1.2 + 0.6x = 1.6 + -1.2

Combine like terms: 1.2 + -1.2 = 0.0
0.0 + 0.6x = 1.6 + -1.2
0.6x = 1.6 + -1.2

Combine like terms: 1.6 + -1.2 = 0.4
0.6x = 0.4

Divide each side by '0.6'.
x = 0.6666666667

Simplifying
x = 0.6666666667