Q: What is the answer for 2x 7 -15?

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2x - 7 = 15 2x = 22 x = 11

4x - 7 = 2x + 15 4x = 2x +222x = 22x = 11

-7 +2x = x + 8 2x - x = 7 + 8 x = 15

f(x) = 2x + 8 f(x) = -7 → 2x + 8 = -7 → 2x = -15 → x = -7½ = -7.5

X=7

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2x - 7 = 15 2x = 22 x = 11

4x - 7 = 2x + 15 4x = 2x +222x = 22x = 11

-7 +2x = x + 8 2x - x = 7 + 8 x = 15

It is 2x - 8

y = 2x + 15 y = 4x + 7 Substitute the value of y from the first equation into the second: 2x + 15 = 4x + 7 Subtract 2x from both sides: 15 = 2x + 7 Subtract 7 from both sides: 8 = 2x Divide both sides by 2: 4 = x. Replace x by its value, 4, in the first equation: y = 2*4 + 15 = 8 + 15 = 23 So the solution is (x, y) = (4, 23)

f(x) = 2x + 8 f(x) = -7 → 2x + 8 = -7 → 2x = -15 → x = -7½ = -7.5

2x + 8 + x = 2x + 15 simplify 2x to both sides since they have the same sign8 + x = 15 subtract 8 to both sidesx = 7

X=7

It is 2x - 8

7 and 8. You know that the sum of any two consecutive whole numbers, x and x +1, is 2x +1 2x + 1 = 15 2x = 14 x = 7

Subtract 7 from each side of the equation: 2x = 8 Divide by 2: x = 4

2x + 7 = 15 Subtract 7 from both sides: 2x = 8 Divide both sides by 2: x = 4