Simultaneous equation 3x+y=8 , x-3y=11

x = 3.5 and y = -2.5

Step-by-step explanation: The pair of simultaneous equations are given as

3x + y = 8 ———(1)

x - 3y = 11 ———(2)

From equation (2) make x the subject of the equation

x = 11 + 3y

Substitute for the value of x into equation (1)

3(11 + 3y) + y = 8

33 + 9y + y = 8

We collect like terms and we now have

33 - 8 = -10y

25 = -10y

Divide both sides of the equation by -10

-2.5 = y

Having solved for the value of y, we now substitute for y into equation (2)

x - 3y = 11

x - 3(-2.5) = 11

x + 7.5 = 11

x = 11 - 7.5

x = 3.5

Therefore x = 3.5 and y = -2.5

x> 6

step-by-step explanation:

8x+8> 7x+14

8x-7x> 14-8

x> 6

2/3x + 7 = 29

step-by-step explanation:

two thirds = 2/3

plus a number = x

at least 29 = 29

there for you should get 2/3x + 7 = 29