book Maths Puzzle Numerical Ability

Can you help me solve this equation? -3x+5=2x-10

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book Other Question

1.)four shovels of sand are used for every 5 shovels of gravel in making concrete.how much gravel is needed for 64 shovels of sand? expand the brackets in the following

x(3-y)
(x+1)(x+2)
az(z2+bz)
(x+y)(x-y)