(4.2*0.3)+(x*0.7)=10

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Solution for (4.2*0.3)+(x*0.7)=10 equation: 


Simplifying
(4.2 * 0.3) + (x * 0.7) = 10

Multiply 4.2 * 0.3
(1.26) + (x * 0.7) = 10
1.26 + (x * 0.7) = 10

Reorder the terms for easier multiplication:
1.26 + (0.7x) = 10

Solving
1.26 + (0.7x) = 10

Solving for variable 'x'.

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

Add '-1.26' to each side of the equation.
1.26 + -1.26 + (0.7x) = 10 + -1.26

Combine like terms: 1.26 + -1.26 = 0.00
0.00 + (0.7x) = 10 + -1.26
(0.7x) = 10 + -1.26

Combine like terms: 10 + -1.26 = 8.74
(0.7x) = 8.74

Divide each side by '0.7'.
x = 12.48571429

Simplifying
x = 12.48571429

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