4x + 3y = -5 (Eq 1) 3x + 5y = -12 (Eq 2) Multiply the first equation by 3 and the second by 4: 12x + 9y = -15 (Eq 3) 12x + 20y = -48 (Eq 4) subtract Eq 3 from Eq 4 gives 11y = -33 so y = -3 and x = (15 + 12)/3 =1 Check: (4 x 1) + (3 x -3) = 4 - 9 = -5 and (3 x 1) + (5 x -3) = 3 - 15 = -12 QED Subtract
It is an equation and the value of d is 2
It is an equation and the value of x is 7
It is an equation and the value of x is 13/3
This is a simultaneous equation question. 4(3x+4y = 90) 3(4x-3y = -5) Multiply the top equation by 4 and the bottom equation by 3 then subtract the bottom equation from the top equation remembering that in maths a minus from a minus is equal to a plus. 12x+16y = 360 12x-9y = -15 And when subtracted: 0+25y = 375 Divide both sides of the equation by 25 to find the value of y: y = 15 Substitute 15 for y into the original equation to find the value of x: Solution: x = 10 and y = 15
Presumably this is a simultaneous equation in the form of: 3r-4s = 0 2r+5s = 23 Multiply all the terms in the top equation by 2 and in the bottom equation by 3: 6r-8s = 0 6r+15s = 69 Subtract the bottom equation from the top equation: -23s = -69 Divide both sides by -23 to find the value of s remembering that a minus number divided into a minus number is equal to a plus number: s = 3 Substitute the value of s into the original equations to find the value of r: Therefore: r = 4 and s = 3
Another straight line equation is needed such that both simultaneous equations will intersect at one point.
Solving tne simultaneous equation gives x = 19.8 and y = -2.2
It seems to be some kind of simultaneous equation with too many equality signs in it.
It's a simultaneous equation and can be solved by elimination which works out as:- x = -4 and y = 1
It is a simultaneous equation and when solved its solutions are x = 71/26 and y = 50/13
x+4y = 7 x+y = 4 Subtract the second equation from the first equation: 3y = 3 Divide both sides by 3 in order to find the value of y: y = 1 Substitute the value of y into both original equations in order to find the value of x: Therefore it follows that: x = 3 and y = 1
It is an equation and the value of x is 4
It is an equation and the value of x is -3
It is an equation and the value of x is 1
It is an equation and the value of x is 2
It is an equation and the value of x is 4
It is an equation and the value of x is 6