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Q: How can you solve this elimination x plus 8y equals 3 2x plus 3y equals -7?

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x = 3 and y = 3 Form a simultaneous equation and solve by elimination.

y=16 x= -4

(2,-2)

Yes and it works out that x = 3 and y = 4

y= -2x

2x+a=p 2x=p-a x=.5p-.5a

3

36

8

2x + 2y = 44x + y = 1There are many methods you can use to solve this system of equations (graphing, elimination, substitution, matrices)...but no matter what method you use, you should get x = -1/3 and y = 7/3.

many solutions

x=35

Usually elimination is used on two equations and is called linear combination. You could solve for "y." That is customary. 2x+3y=1 3y=-2y+1 y=(-2/3)x+1/3

(2x)ysquared

(3,3)

2x+3 = 7 2x = 7-3 2x = 4 x = 2

2x+32 = 1 2x = 1-32 2x = -31 x = -15.5

2x + 2x + 146 + 26 = 172 4x + 172 = 172 4x = 0 x = 0

You cannot solve one equation in two unknowns.

If: x+1+2x = 1x+5 Then: x = 2

x + y = -2 2x + 3y = -9 You solve this by elimination - multiply both sides of first equation by 3, then subtract, solve for x, then substitute in any of the equations to solve for y 3x + 3y = -6 2x + 3y = -9 subtracting, x = 3 substituting into 1st equation, y = -2-3 = -5

4+ X equals 2X. Subtract X from both sides. Four equals X

If 2x + 5 = 11, then 11 - 5 = 2x 6 = 2x 3 = x

2x+3 = -11 2x = -11-3 2x = -14 x = -7

2x+1 = 9 2x = 9-1 2x = 8 x = 4