4x+10y=100;7x+9y=158
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Step-by-step explanation:
4x + 10y = 100
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-10y' to each side of the equation.
4x + 10y + -10y = 100 + -10y
Combine like terms: 10y + -10y = 0
4x + 0 = 100 + -10y
4x = 100 + -10y
Divide each side by '4'.
x = 25 + -2.5y
Simplifying
x = 25 + -2.5y
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