Question

(?,3) is on the line y=2x+5 what is the other coordinate

Answer 1

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➷ Substitute it into the equation:

3 = 2x + 5

Subtract 5 from both sides:

-2 = 2x

Divide both sides by 2:

x = -1

The other coordinate is -1

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Answer 2

-1

Explanation:

1.We know that the equation of the line is y=2x+5 ( with a gradient of 2 and a

y-intercept of 5) and the y coordinate is 3 so we must work out x (x,3).

2.We know y=3 so

3 = 2x+5

3. Solve the equation

3=2x+5

(-5 from both sides)

-2=2x

(Divide both sides by 2 to isolate x)

-1 = x so x = 1

Hope this helps:)

5INGH