A ball and a bat cost £90 in total. Three balls and two bats cost £210 in total. How much does a bat cost?
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Using the cost of 3 balls and 3 bats If one ball and one bat cost £90, then three balls and three bats cost £90\times3 = £270. Three balls and two bats cost £210, and £210 + £60 = £270. So the extra bat must cost £60.

Step-by-step explanation:

60

Step-by-step explanation:

ball =x

bat = y

x + y = 90

and

equation II is

3 x + 2 y =210

By multiplying by 3 to equation I both sides

we get equation III as

3( x + y) = 3 ( 90 )

3x + 3y =270 III

subtract II and III

we get 3x+3y=270

- 3x+2y=210

0+y= 60

y =60

cost of bat is y ie = 60

and cost of ball ,is

let put value of y in equation I

x+60=90

x=90-60

x=30

cost of ball is 30

d

step-by-step explanation:

d

step-by-step explanation:

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