Cost of two pencils and three earasers is rs 18, while the cody of one pencil and two erasers is rs 11. the cost of each pencil is
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Let the cost of each pencil be x.
Let the cost of each eraser be y.
2x+3y=18
2x=18-3y
x=18-3y/2
x+2y=11
18-3y/2+2y=11
18-3y+4y/2=11
18-3y+4y=11×2
18+y=22
y=22-18
y=4
2x+3y=18
2x+3×4=18
2x+12=18
2x=18-12
2x=6
x=6/2
x=3
Let the cost of each eraser be y.
2x+3y=18
2x=18-3y
x=18-3y/2
x+2y=11
18-3y/2+2y=11
18-3y+4y/2=11
18-3y+4y=11×2
18+y=22
y=22-18
y=4
2x+3y=18
2x+3×4=18
2x+12=18
2x=18-12
2x=6
x=6/2
x=3
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