Collecting like terms
3x + 4x
7x
Evaluate x + 7 when x = 3
10
Solve x + 7 = 10
x = 3
Solve 2x + 1 = 15
x = 7
Solve 3x + 4 = 2x + 7
x = 3
2a + 5a + 3b + 4b
7a + 7b
Evaluate 8a when a = 2
16
Solve 4x = 28
x = 7
Solve 3a - 6 = -21
a = -5
Solve 5a - 4 = 4a - 9
a = -5
6x - 4y + x + 2y
7x - 2y
Evaluate 2x + 1 when x = -3
-5
Solve a - 6 = -12
Solve -2x + 5 = 13
x = -4
Solve 6p + 3 = 4p + 13
p = 5
7a + 2b - a + b
6a + 3b
Evaluate 2a + 5b when a = 2 and b = -3
-11
Solve 5x = -60
x = -12
Solve 5 + 3x = 17
x = 4
Solve 7x - 3 = 4x - 18
x = -5
5a + 3b - 4c - 2a + b - 5c
3a + 4b - 9c
Evaluate 5a - 4b when a = -2 and b = -3
2
Solve x/4 = 11
x = 44
Solve 7 - 4a = -21
a = 7
Solve 5x + 6 = 2x + 7
x = 1/3