Solving for X
solve for x + 5 = 12
what is x = 7
2x + 3x
what is 5x
x² + 5x + 6
what is (x + 2)(x + 3)
I have $12. I spend $x. What’s left?
$12 - x
Identify slope: y = 2x + 3
Slope = 2
2x - 4 = 10
what is x = 7
4(x - 2) + 3x
what is 7x - 8
x² - 9
what is (x - 3)(x + 3)
Twice a number is 14. What is the number?
2x = 14 → x = 7
Is (2, 5) on the line y = x + 3?
y = 2 + 3 = 5 → YES
3(x + 2) = 18
what is x = 4
(x + 2)(x - 3) - x²
what is -x - 6
x² - 4x - 21
what is
(x - 7)(x + 3)
A rectangle has area 24 and width x. Find length if A = lw
24 = x * L → L = 24/x
Graph y = -x + 1
Line with slope -1, y-intercept 1 (straight line downward)
(x/2) + 6 = 10
what is x = 8
3x - [2(x - 1) + 4]
what is x - 6
3x² + 12x
what is
3x(x + 4)
A car travels 60 miles in x hours. Write an equation for speed.
Speed = 60/x
Find x-intercept: y = 2x - 8
0 = 2x - 8 → x = 4
4x - (x/3) = 10
what is x = 30/11 or ~2.73
(x² - 9)/(x + 3)
what is x - 3
x³ - 27
what is
(x - 3)(x² + 3x + 9)
I’m thinking of a number: half it and subtract 3 = 5. What is it?
x/2 - 3 = 5 → x = 16
Equation of line through (1,2), slope 3
y - 2 = 3(x - 1) → y = 3x - 1