0.75x+0.05(4-x)=0.10(-12)

Solution for 0.75x+0.05(4-x)=0.10(-12) equation:

Simplifying
0.75x + 0.05(4 + -1x) = 0.10(-12)
0.75x + (4 * 0.05 + -1x * 0.05) = 0.10(-12)
0.75x + (0.2 + -0.05x) = 0.10(-12)

Reorder the terms:
0.2 + 0.75x + -0.05x = 0.10(-12)

Combine like terms: 0.75x + -0.05x = 0.7x
0.2 + 0.7x = 0.10(-12)

Multiply 0.10 * -12
0.2 + 0.7x = -1.2

Solving
0.2 + 0.7x = -1.2

Solving for variable 'x'.

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

Add '-0.2' to each side of the equation.
0.2 + -0.2 + 0.7x = -1.2 + -0.2

Combine like terms: 0.2 + -0.2 = 0.0
0.0 + 0.7x = -1.2 + -0.2
0.7x = -1.2 + -0.2

Combine like terms: -1.2 + -0.2 = -1.4
0.7x = -1.4

Divide each side by '0.7'.
x = -2

Simplifying
x = -2