x + 7 - 2x = 18
Combine the terms containing x: 7 - x = 18
Subtract 7 from both sides: -x = 11
Multiply both sides by -1 (or change the sign on both sides): x = -11
Equality
14 + 18 = 18 + 14 demonstrates the commutative property (of addition).
72 but there is such a thing as a CALCULATOR
2+14=16
U = 4 x 18 U = 72
How do you add 2x plus 3y equals 18 in 5x-y equals 11
21
69
No.
No.
49+18= 67
18+18+18+19+23+23+24+24=167