Question

solve by elimination method 7x + 5y =74, x + 2y = 17
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Answer 1

Answer:

7x+5y=74,-------------------------1

x+2y=17----------------------------2

now let's multiply equation 2 with 7

so x+2y=17×7

so it is 7x+14y=119---------------3

now let's multiply equation 1 with 3

7x+5y=74

- 7x+14y=119

= 0-9y =-45

y =-9÷-45

therefore y=5

now substitute the value of y in equation 2

x+2y=17

x+2×5=17

x+10=17

x=17-10

therefore x=7

answers. x=7,y=5