genitamangur genitamangur

26-04-2017
Mathematics

contestada

Use the substitution method to solve the following pair of simultaneous equations.
x+3y=4
y=2x-1

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JohnnysteinR JohnnysteinR

26-04-2017

x + 3y= 4

-2x+ y= -1 (-2x from the other side)

2x+ 6y= 8 (multiply by 2)

-2x+ y= -1

7y =7

y= 1

x+ 3(1)= 4 (you do this to find the y)

x+ 3= 4

x= 1 (-3 from the other side)

x= 1 y=1 (1,1)

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