The easiest way to solve this system of equations is to solve for a variable in one of the equations. In the second equation, y = 3x. This can be substituted into the first equation:
y = -4x - 7;
3x = = -4x - 7;
7x = -7;
x = -1.
Since we have determined that x equals -1, we can then substitute -1 into either equation to find our corresponding y-value. Thus:
y = 3x;
y = 3(-1)
y = -3.
Thus, the solution to this system of equations is (-1, -3).
y= -4x-7 y=3x 3x= -4x-7 3x+4x=7 7x=7 x=1
4x-y=2, thereforey=4x-2sub y into 3x+2y=6...3x+8x-4=611x=10x=10/11
4x+7-3x = 15 4x-3x = 15-7 x = 8
3x = 7 - 4x 3x + 4x = 7 - 4x + 4x 7x = 7 7x/7 = 7/7 x = 1
3x+7=4x-73x=(-)7+4x-4x(-)1x=(-)7________(-)1x=7add (-3x) to each side of equation3x +7 = 4x-3x +3x +7 = 4x -3x0 +7= 1x7=x
7x = 3x - 12 4x=-12 x=-3
3x+5=7x-11 5=4x-11 4x=16 x=4
5+4x-7 = 4x+3-x 4x-2 = 3x+3 4x-3x = 3+2 x = 5
You cant solve it unless it is an equation. To be an equation it must have an equals sign.
3x+7=4x 7=4x-3x 7=x
x + 5 = 4x/3 Solve for x multiply both sides of the equation by 3... 3 * (x + 5) = 3 * (4x/3) 3x + 15 = 4x subtract 3x from both sides of the equation (3x + 15) - 3x = (4x) - 3x 15 = x x = 15
-3x-8+4x=17(-3x+4x)-8=17 ;combine like terms(x)-8=17 ;add 8 to both sidesx=25