Solve the simultaneous equation x+y/4=1/2 and x-3y/3=2
2 answers:
Answer:
one solution (9/2 ; -1/2)
Step-by-step explanation:
hello :
the system is :
x+y/4=1/2
x-3y/3=2
means : 2(x+y)=4
x-3y = 6
so : x+y = 4 ...(*)
x-3y =6 ....(**)
by (*) : x = 4-y and by (**) : x = 6+3y
so : 6+3y = 4-y
4y =-2 so y = -1/2
x = 4 - (-1/2) = 9/2
Answer:
x+y/4 = 1/2
x-3y/3 = 2
move variables to one side:
multiply the first equation by 4 to get: x+y =2
and the second equation by 3 to get: x-3y =6
then subtract the equations to cancel out x:
x+y = 2
- x-3y = 6
then u get
y--3y = 2-6
4y = -4
y=-1
substitute to solve for x:
x-1 / 4 =1/2
x-1 = 2
x=3
check:
3+-1
2/4= 1/2
correct!!!
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