Question

Solve 2a + 3b = 5 and b = a - 5

Answer 1

Answer:a=4 and b =-1

Step-by-step explanation:you replace b in the first equation with (a-5) so you'll have:

2a+3b =5

2a +3(a-5) =5

2a+ 3a -15=5

5a-15 =5

5a=5+15

a=20/5=4

and to find b you just have to replace a with 4 so u'll have b=4-5=-1



Answer 2

Answer: the first one both a and b =1

for the second one b=3 and a=8