book Maths Puzzle Numerical Ability

four oranges and five apples cost $3.56 three oranges and four apples cost $2.76. find the cost of an orange and the cost of an apple.

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book Other Question

Combine LIKE TERMS to find equivalent expressions for the following:

3x+2x

4x-x+3

2a-4a+-4

-3-3y+7-5y

3(2x=3)-4

2+2(8k-4)-2k

-w+w+64

-8+2s+8

10-( I am having trouble solving this problem. Any help will be greatly appreicated.

square root symbol x-7 - square root symbol x = -1