Solve the simultaneous equation: 2x - y=4, 3x + y =21

(5, 6 )

Step-by-step explanation:

Given the 2 equations

2x - y = 4 → (1)

3x + y = 21 → (2)

Adding the 2 equations term by term will eliminate y

5x + 0 = 25

5x = 25 ( divide both sides by 5 )

x = 5

Substitute x = 5 into either of the 2 equations and solve for y

Substituting into (2)

3(5) + y = 21

15 + y = 21 ( subtract 15 from both sides )

y = 6

solution is (5, 6 )

the answer is: the length is 5/6 yards.

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step-by-step explanation: