To solve the system of equations:
1) 18x - 7x = 18Combine like terms11x = 18Divide by 11x = 17
2) 4x + 27x = 18Combine like terms31x = 18Divide by 31x = 6
(4x + 9x) 7 = 13x 7 = 13 6 7 = 728
Therefore, the solution to the system of equations is x = 17 and x = 6, and (4x + 9x) * 7 = 728.
To solve the system of equations:
1) 18x - 7x = 18
Combine like terms
11x = 18
Divide by 11
x = 17
2) 4x + 27x = 18
Combine like terms
31x = 18
Divide by 31
x = 6
(4x + 9x) 7 = 13x 7 = 13 6 7 = 728
Therefore, the solution to the system of equations is x = 17 and x = 6, and (4x + 9x) * 7 = 728.