Answer:
2
Step-by-step explanation:
any expression divided by 1 remains the same
you can also calculate the factorial
4a + 7b = 38 -> (1)
9a + 7b = 68 -> (2)
Subtract (1) from (2),
9a - 4a + 7b - 7b = 68 - 38
5a = 30
a = 6
Answer:
-t = -8 ×5
-t = -40
t= 40
good luck have a nice day
