7x+4.20(25-x)=6.16(25)

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Solution for 7x+4.20(25-x)=6.16(25) equation: 


Simplifying
7x + 4.20(25 + -1x) = 6.16(25)
7x + (25 * 4.20 + -1x * 4.20) = 6.16(25)
7x + (105 + -4.2x) = 6.16(25)

Reorder the terms:
105 + 7x + -4.2x = 6.16(25)

Combine like terms: 7x + -4.2x = 2.8x
105 + 2.8x = 6.16(25)

Multiply 6.16 * 25
105 + 2.8x = 154

Solving
105 + 2.8x = 154

Solving for variable 'x'.

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

Add '-105' to each side of the equation.
105 + -105 + 2.8x = 154 + -105

Combine like terms: 105 + -105 = 0
0 + 2.8x = 154 + -105
2.8x = 154 + -105

Combine like terms: 154 + -105 = 49
2.8x = 49

Divide each side by '2.8'.
x = 17.5

Simplifying
x = 17.5

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