10x - 3y + 2x - 4y =(10x + 2x) + (-3y - 4y) =12x - 7y
2x + 3y = 17 3x + 4y = 24 (2x + 3x) + (3y + 4y) = (17 + 24) 5x + 7y = 41
Since 2x-3y=4y=8 we can say that 4y=8 therefor y=2 We can also say that 2x-3y=4y and as y=2 2x-6=8 so 2x=14 and x =7 so y=2 and x=7
2x-3y = 4 x+4y = -9 => x = -9-4y Substitute x = -9-4y into the top equation: 2(-9-4y)-3y = 4 -18-8y-3y = 4 -8y-3y = 4+18 -11y = 22 Divide both sides by -11 to find the value of y: y = -2 Substitute the value of y into the original equations to find the value of x: Therefore: x = -1 and y = -2 Remember that the product of a minus times a minus is equal to a plus when working out the original equations,
It is the same as: 6x+4y
If: 2x-3y = -15 and x = 4y Then: x = -12 and y = -3
10x - 3y + 2x - 4y =(10x + 2x) + (-3y - 4y) =12x - 7y
2x - 3y = -15x => -3y = -17x => -21y = -119x 2x - 3y = 4y => 2x = 7y => 21y = 6x so now you can add the two equations. 0 = -113x x=0 now plug back in 2*0 - 3y = -15*0 -3y = 0 y=0.
10x+2x-3y-4y=12x-7y
2x + 3y = 17 3x + 4y = 24 (2x + 3x) + (3y + 4y) = (17 + 24) 5x + 7y = 41
4x + 3y - 2x - 7y2x - 4y
Since 2x-3y=4y=8 we can say that 4y=8 therefor y=2 We can also say that 2x-3y=4y and as y=2 2x-6=8 so 2x=14 and x =7 so y=2 and x=7
2x-3y = 4 x+4y = -9 => x = -9-4y Substitute x = -9-4y into the top equation: 2(-9-4y)-3y = 4 -18-8y-3y = 4 -8y-3y = 4+18 -11y = 22 Divide both sides by -11 to find the value of y: y = -2 Substitute the value of y into the original equations to find the value of x: Therefore: x = -1 and y = -2 Remember that the product of a minus times a minus is equal to a plus when working out the original equations,
It is the same as: 6x+4y
41
3x + 7y
2x - 3y = 3 ------ Eq.1 multiply this by -55x - 4y = 4 ------ Eq.2 multiply rhis by 2_____________________________________ the result after multiply both equation-5 ( 2x - 3y = 3 )2 ( 5x - 4y = 4 )_________________-10x + 15y = -1510x - 8y = 8_________________ by using the elimination method the result will be7y = -7y = -7/7 ,,,,,,,,,,, Y = -1to find the value of X, put the value of Y in Eq.1 :2x - 3y = 32x - 3(-1) = 32x + 3 = 32x = zero ,,,,,,,,,,, X = Zero