3x + 9 y = 120
5x + 5y = 90
multiply first equation by 5 ( both sides)
multiply second equation by 3 ( both sides)
15 x + 45 y = 600
15 x + 15 y = 270
subtract
30y = 330
divide by 30
y = 11
substiute y into first equation
3 x + 9 y = 120
3x + 99 = 120
3x = 21
x = 7
Another straight line equation is needed such that both simultaneous equations will intersect at one point.
x = 5 and y = -8 Solved by forming a simultaneous equation and eliminating y in order to find the values of x and y.
5
-0.5
You cannot solve one equation in two unknowns.
Another straight line equation is needed such that both simultaneous equations will intersect at one point.
The elimination method only works with simultaneous equations, hence another equation is needed here for it to be solvable.
x = 5 and y = -8 Solved by forming a simultaneous equation and eliminating y in order to find the values of x and y.
k equals 5.6
5
you can not solve this equation
The equation does not have a solution.
27
-0.5
The solutions work out as: x = 52/11, y = 101/11 and x = -2, y = -11
Solve the following equation for A : 2A/3 = 8 + 4A
You cannot solve one equation in two unknowns.