book Maths Puzzle Numerical Ability

Hello!

I need help with one more problem.

1.(3 cubed)/5) x (1 squared)/ 3

Please help

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book Other Question

Please show me how to solve the following equation:

6x + 7 = 8x - 13

Thank you! directions: solve by graphing.

-3<_x<_2 (-3 is less than or equal to x which is leass than or equal to 2)
y<-2x+1 (y is less than -2x+1)

(i do not understand how to graph