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26-01-2020
Mathematics

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If a+3b=13 and a+b=5 the value of b is

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texaschic101 texaschic101

26-01-2020

Answer:

b = 4

Step-by-step explanation:

a + 3b = 13

a + b = 5 .....multiply by -1

=============

a + 3b = 13

-a - b = -5 (result of multiplying by -1)

=============add

2b = 8

b = 8/2

b = 4 <====

a + b = 5

a + 4 = 5

a = 5 - 4

a = 1

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