Question

4x+10y=100;7x+9y=158

Answer 1

Answer:

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