You have two equations with two unknowns, y and x
To solve,
y = -3x +7
y = 2x -8
since they are equal
-3x + 7 = 2x-8
7= 5x -8
15 = 5x
3 = x
substitute in either equation to get y
y = -2
3x+7=2x-5 x=-12
3x - 2x + 4 = 0 3x - 2x = -4 x = -4
An equation where x equals 3.
6 - x + 7 - 3x - 5 = -2x - 10 ∴ x + 3x - 2x = 6 + 7 - 5 + 10 ∴ 2x = 18 ∴ x = 9
3x=2x-12x=-12
3x+7=2x-5 x=-12
3x - 2x + 4 = 0 3x - 2x = -4 x = -4
An equation where x equals 3.
2x+3y=13 3x-y=3 x=2
6 - x + 7 - 3x - 5 = -2x - 10 ∴ x + 3x - 2x = 6 + 7 - 5 + 10 ∴ 2x = 18 ∴ x = 9
3x=2x-12x=-12
X=7
3x2 + 2x - 8 = 0 is a quadratic equation.
2x+3x = 5x
If: 2x+5y = 2 and -3x-y = -3Then it works out that: x = 1 and y = 0
-3X
-4x-1-3x-4+5 = -7x-1-2x+1+6 -7x = -9x+6 2x = 6 x = 3