Question

2a +3b=5
b=a-5 solve

Answer 1

Answer:

a = 4

Step-by-step explanation:

2a +3b = 5

Put value of b in above question

2a + 3(a-5) = 5

2a + 3a - 15 =5

5a - 15 = 5

5a = 5 + 15

5a = 20

a = 20/5

a = 4

Answer 2

Answer:

10

Step-by-step explanation:

2a - 3b + 5 = 10

2a - 3b + 5 - 5 = 10 - 5

2a - 3b = 5

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

2a = 5 + 3b

(2a)/2 = (5 + 3b)/2

(1)a = (5 + 3b)/2

a = (5 + 3b)/2

2a - 3b + 5 = 2(10) - 3(2) + 5

= 20 - 6 + 5

= 14 + 5

= 19 is the result or the value of the given expression when a = 10 and b = 2.