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Solve the system of equations using elimination.15q – 4r = 625q + 8r = 86

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SOLUTION:Thank

In this question, we are meant to solve the system of equations using the elimination method:

15q – 4r = 62 --------- equ 1

5q + 8r = 86​ ----------- equ 2

To eliminate q , we need to multiply equ 2 by 3, 15q + 24 r = 258 ------- equ 3

Then solving equ 1 and equ 3, we have:

15q – 4r = 62 ---------equ 1

15q + 24 r = 258 ------- equ 3

equ 3 - equ 2, we have:

15 q - 15 q + 24 r - ( - 4r ) = 258 - 62

24 r + 4 r = 196

28 r = 196

Dividing both sides by 28, we have:

r = 7.

Next, we put the value of r = 7, in equ 1,

15q – 4r = 62 --------- equ 1

15 q - 4 ( 7 ) = 62

15q - 28 = 62

15q = 62 + 28

15q = 90

Dividing both sides by 15, we have :

q = 6.

CONCLUSION: The value of r = 7 and q = 6.



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