Question

solve the simultaneous equations
3x+y=8
x-3y=11

Answer 1

Answer:

x = 3.5

y = -2.5

Step-by-step explanation:

3x + y = 8 _______(i)

x - 3y = 11 _______(ii)

From equation (ii), we get:

x = 11 + 3y _______(iii)

Put the value of x from equation (iii) in equation (i), we get:

3 (11 + 3y) + y = 8

33 + 9y + y = 8

33 + 10y = 8

10y = 8 - 33 = -25

y = -25/10 = -2.5

Put the value of y = -2.5 in equation (iii), we get:

x = 11 + 3(-2.5) = 11 - 7.5 = 3.5

So, we get the values of x & y as:

x = 3.5

y = -2.5

Thanks!

Answer 2

Step-by-step explanation:

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