Question

What is b in 2a+3b=5 when b=a-5

Answer 1

Answer:

-1

Step-by-step explanation:

Given : b = a-5

2a+3b = 5

2a+3(a-5) = 5

2a+3a-15 = 5

5a = 20

a = 4

b = a-5

b = 4-5

b = -1

Answer 2

Using substituting method

b = a-5

putting b value in 2a + 3b = 5

2a + 3(a-5) = 5

2a + 3a-15 = 5

5a = 20

a = 4

b = a-5

b = 4-5

b = -1

a value is 4 and b value is -1