.75x+.05(20-x)=.10(-18)

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Solution for .75x+.05(20-x)=.10(-18) equation:


Simplifying
0.75x + 0.05(20 + -1x) = 0.10(-18)
0.75x + (20 * 0.05 + -1x * 0.05) = 0.10(-18)
0.75x + (1 + -0.05x) = 0.10(-18)

Reorder the terms:
1 + 0.75x + -0.05x = 0.10(-18)

Combine like terms: 0.75x + -0.05x = 0.7x
1 + 0.7x = 0.10(-18)

Multiply 0.10 * -18
1 + 0.7x = -1.8

Solving
1 + 0.7x = -1.8

Solving for variable 'x'.

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

Add '-1' to each side of the equation.
1 + -1 + 0.7x = -1.8 + -1

Combine like terms: 1 + -1 = 0
0 + 0.7x = -1.8 + -1
0.7x = -1.8 + -1

Combine like terms: -1.8 + -1 = -2.8
0.7x = -2.8

Divide each side by '0.7'.
x = -4

Simplifying
x = -4

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