Solve this system of linear equation 7x+11y=-2
7x+3y=30

x = 5.2

y = 3.5

Step-by-step explanation:

in order to solve the linear equation simultaneous we say

let

7x+11y=-2 equation 1

7x+3y=30 equation 2

from equation 1

7x+11y=-2 equation 1

7x = 2 - 11y

divide both sides by the coefficient of x which is 7

7x/7 = 2 - 11y/ 7

x = (2 - 11y)/7 equation 3

put equation 3 into equation 2

7x+3y=30 equation 2

7[ ( 2 - 11y)/ 7 ] + 3y = 30

2 - 11y + 3y = 30

2 - 8y = 30

-8y = 30-2

-8y = 28

divide both side by -8

-8y/-8 = 28/-8

y = 3.5

put the value of y in equation  3

x = (2 - 11y)/7 equation 3

x =  ( 2 - 11(3.5)]/ 7

x = 2 - 38.5/7

x= 36.6/7

x  =  5.2

option 1

data plot with   3 dots over 33, 1 dot over 34, 2 dots over 35, no dot over 36, 1 dot over 37, 2 dots over 38, 4 dots over 39, and 2 dot over 40.

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step-by-step explanation:

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