Question

solve 2a-3b=7 5a+b=9​

Answer 1

Answer:

2a - 3b = 7 ( equation 1 )

5a + b = 9 ( equation 2 )

from equation 2 we will get

b = 9 - 5a ( equation 3 )

substitute ( equation 3 ) into ( equation 1 )

2a - 3( 9 - 5a ) = 7

2a - 27 + 15a = 7

2a + 15a = 7 + 27

17a = 34

a = 34/17

a = 2

substitute 2 in ( equation 2)

b = 9 - 5(2)

b = 9 - 10

b= -1

the final answer is

a = 2 , b = - 1

Step-by-step explanation:

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