Question

How to solve equation an equation without y using elimination method

Answer 1

Work only with the second equation at the beginning. Solve for x for it.

7x - 2x = 3                Combine the left hand side.

5x = 3                       Divide by 5

5x/5 = 3/5                Do the division

x = 3/5 = 0.6    

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Now work with the top equation.

3(0.6) + 5y = 13              Multiply on the left.

1.8 + 5y = 13                   Subtract 1.8 from both sides.

1.8 - 1.8 + 5y = 13 - 1.8    Do the subtraction

5y = 11.2                          Divide by 5

5y/5 = 11.2/5

y = 2.24                           Answer