One-Step Equations +/-
Solve for x:
x + 2 = 5
x + 2 = 5 -2 -2
x = 3
Solve for x:
x/4 = 12
x = 48
Since x is divided by 4, we must do the opposite and multiply both sides by 4. 12 * 4 = 48
Solve for x:
2x + 4 = 6
x = 1
2x + 4 = 6 - 4 -4 2x = 2 Divide each side by 2. 2 divided by 2, x = 1.
The sum of the mystery number and 8 is 24. Write an equation and solve.
n + 8 = 24
The mystery number is 16.
Simplify:
8x - 5(2x + 6)
-2x - 30
n - 18 = 47
n = 65
13x = 26
x = 2
Solve for x:
7x + 3 = 31
x = 4
7x + 3 = 31 - 3 - 3 7x = 28 Since x is being multiplied by 7, you must divide each side by 7. 28 divided by 7, x = 4
The difference of the mystery number and 15 is 43. Write an equation and solve.
n - 15 = 43 The mystery number is 58.
Simplify:
2n - 12 + 4m + 8
2n - 4 + 4m
b + 41 = 23
b = -18
-8a = 56
a = -7
Solve for z:
23 = -3z - 7
z = -10
-3z - 7 = 23 +7 +7 -3z = 30 Since z is being multiplied by -3, you must divide each side by -3. 30 divided by -3, z = -10
The product of the mystery number and -7 is 84. Write an equation and solve.
-7n = 84 The mystery number is -12.
Simplify:
4(3x - 8) - 3(x + 4)
9x - 44
Solve for y:
y - 12 = -43
y = -31
m/-12 = -16
m = 192
Solve for z:
2(-z - 3) + 1 = 19
z = -12
The quotient of the mystery number and -4 is -12. Write an equation and solve.
n/-4 = -12 The mystery number is 48.
Simplify then evaluate for n = 2 and x = -4
2n + 3x - 8(-2x - 3)
2n +19x + 24 and -48
y - 8 = 32
y = 40
Solve for n:
n/-5 = 10
n = -50
Solve for a:
-12 = -19 + -7a
a = -1
3 more than twice the mystery number is 31. Write an equation and solve.
3 + 2n = 31 The mystery number is 14.
Simplify:
-8m - 9(5m - 3m) - 4(m + 3)
-30m - 12