5 kg of apples cost £7

2kg of apples and 3kg of bananas cost £5.65

work out the cost of 1 kg bananas

2kg of apples and 3kg of bananas cost £5.65

work out the cost of 1 kg bananas

Guest Mar 4, 2012

#1**0 **

a: cost of 1kg of apples

b: cost of 1kg of bananas

searched: b = work out the cost of 1 kg bananas

equation1:** 5*a = 7**

equation2:** 2*a + 3*b = 5.65**

[input]solve( 5*a = 7, 2*a + 3*b = 5.65 )[/input]

{a=1.4, b=0.95}

b=**£0.95**

test: 5*a = 5*1.4 = 7

test: 2*a+3*b = 2*1.4+3*0.95 = 5.65

solve manually:

5*a = 7

a = 7/5

2*a + 3*b = 5.65

2*(7/5) + 3*b = 5.65

14/5 + 3*b = 5.65

14/5 + 3*b -14/5 = 5.65 - 14/5

3b = 2.85

b = 2.85 / 3 =**0.95**

wahaby:5 kg of apples cost £7

2kg of apples and 3kg of bananas cost £5.65

work out the cost of 1 kg bananas

a: cost of 1kg of apples

b: cost of 1kg of bananas

searched: b = work out the cost of 1 kg bananas

equation1:

equation2:

[input]solve( 5*a = 7, 2*a + 3*b = 5.65 )[/input]

{a=1.4, b=0.95}

wahaby:work out the cost of 1 kg bananas

b=

test: 5*a = 5*1.4 = 7

test: 2*a+3*b = 2*1.4+3*0.95 = 5.65

solve manually:

5*a = 7

a = 7/5

2*a + 3*b = 5.65

2*(7/5) + 3*b = 5.65

14/5 + 3*b = 5.65

14/5 + 3*b -14/5 = 5.65 - 14/5

3b = 2.85

b = 2.85 / 3 =

admin
Mar 4, 2012