Question

5x-9=1/y,x+y/2=7/10 simultaneous linear equation

Answer 1

Answer:

Solve the following system of equations:

4y+3x4y−19x=100…(1)=12…(2)

Use either equation to express x in terms of y

4y+3x3xx=100=100−4y=100−4y3

Substitute x into equation (2) and solve for y

4y−19(100−4y3)12y−19(100−4y)12y−1 900+76y88y∴y=12=36=36=1 936=22

Substitute y back into equation (1) and solve for x

x∴x=100−4(22)3=100−883=123=4

Check the solution by substituting the answers back into both original equations

Write the final answer

xy=4=2

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Answer 2

Answer:

A

Step-by-step explanation: