3n+18 = 39 -4n
3n+4n = 39 -18
7n = 21
n = 3
72 but there is such a thing as a CALCULATOR
U = 4 x 18 U = 72
69
No.
18+18+18+19+23+23+24+24=167
18 plus 18 plus 18 equals 54. This can be calculated by adding the first two 18s together to get 36, and then adding the third 18 to get the final sum of 54. This is a basic arithmetic operation involving addition of three numbers.
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
The Answer is Commutative Property