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Work out the following:

a) -9x4

b) 6x-12

c) -8x-3

Do the following equal a + or a -?

a) -x-

b)+x-

c)-x+

Work out the following:

a) -36

b) -72

c) 24

Do the following equal a + or a -?

a) +

b) -

c) -