0.04x+0.02y=5,0.5x-0.4y=30
Answers
Answer:
x = 250 y =250
Step-by-step explanation:
0.04x + 0.02y = 5
0.5x + 0.02y = 30
(-) (-) (-) -----------------------> change the sign of terms
----------------------------
-0.1X = -25
both negative sign cancelled
0.1x = 25
x =25/0.1
x = 250/1 (to eliminate decimal number multiple on both side by 10 (25*10 /0.1*10))
x = 250
subsitute in any above equation to find y value
0.04 (250) + 0.02y = 5
10 + 0.02y = 5
0.02y = 5 - 10
0.02y = 5
y = 5/0.02
y = 5*100/2 (to eliminate decimal number multiple on both side by 100 (5*100 /0.02*100))
y = 250
x = 250 y =250
Answer:
Hey there bud the above answer is wrong,answer for this is y=50 and x=100
Step-by-step explanation:
0.04x+0.02y=5
now u can either keep it this way or multiply it by 100 to get whole numbers. like to keep numbers whole.
therefore= 4x+2y=500
now:
4x+2y= 500
4x = 500-2y
x = (500-2y)/4
Now that we have the first equation. we can replace x in the second equation
5((500-2y)/4)-4y= 30
2500-10y-16y= 1200 (multiply 4 and 30 by 4 to remove the denominator of the equation )
2500-26y= 1200
-26y= 1200-2500
-26y= -1300
-y= -1300/26
-y= -50
y= 50
now u can replace y in the first equation
4x +2(50)=500 (y=50)
4x + 100 = 500
4x = 500-100
4x = 400
x = 400/4
x = 100
Hope this helps you bud. if this helped you I am thankfull