Question

Give me step by step solution

The correct answer will be brainliest

Answer 1

Answer:

300

Step-by-step explanation:

here 2a-3b=60

a+b=180

=> 3a +3b=540

adding (I) and (iii) ,we get

5a=600

=> a=120

b=60

therefore, 5b=300

Answer 2

Step-by-step explanation:

a+b=180 ____(as they are in a linear pair)__1

2a-3b=60____(given)_____2

multiplying 1 equation by 3

3a+3b=540___3

adding equation 2 and 3

3a+3b=540

+ 2a-3b= 60

______________

5a =600

a=600/5

a=120

substituting a=120

in equation 1

a+b=180

120+b=180

b=180-120

b=60

5b= 5×60

5b =300