Question

7x — 2y = - 7
y=7
Substitution

Answer 1

x=1 and y=7

Explanation:

7x−2y=−7;y=7

Rewrite equations:

y=7;7x−2y=−7

Step: Solve y = 7 for y:

y=7

Steps: Substitute 7 for y in 7x−2y=−7:

7x−2y=−7

7x+(−2)(7)=−7

7x−14=−7 (Simplify both sides of the equation)

7x−14+14=−7+14 (Add 14 to both sides)

7x=7

7x/7 = 7/7 (Divide both sides by 7)

x = 1

So the answer is, x=1 and y=7