Question

Someone help me with these math problems please
Please

Answer 1

a=15 26.1 + b =54.6

Explanation:

for the second question we first multiply 8.7 by 3 which gives us 26.1 and since there is only one answer with 26.1 it's it.

Answer 2

a = 15

34.8 + b = 54.6

Explanation:

First one:

5a - 10b = 45 (b = 3)

5a - 10(3) = 45

5a - 30 = 45

5a = 75

a = 15

Second one

b + a + 3a = 54.6

b + 4a = 54.6 ( a = 8.7)

b + 4(8.7) = 54.6

b + 34.8 = 54.6

34.8 + b = 54.6