Question

5. Find the value of y in the equation 2x + y = 7,
if x=2. Find x if y=1.​

Answer 1

SOLUTION!

We have two equations:

We have two equations: 2x + y = 7

We have two equations: 2x + y = 7x + 2y = 5

We have two equations: 2x + y = 7x + 2y = 5Notice that something nice happens when we ADD them. We get:

We have two equations: 2x + y = 7x + 2y = 5Notice that something nice happens when we ADD them. We get: 3x + 3y = 12

We have two equations: 2x + y = 7x + 2y = 5Notice that something nice happens when we ADD them. We get: 3x + 3y = 12Divide both sides by 3 to get: x + y = 4

We have two equations: 2x + y = 7x + 2y = 5Notice that something nice happens when we ADD them. We get: 3x + 3y = 12Divide both sides by 3 to get: x + y = 4So, (x + y)/3 = 4/3

thankyou!

Answer 2

Answer:

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