Question

determine a soma dos monomios seguintes

1:7x-4x+3x=

2:5xy+15xy-12xy-12xy+2xy

Answer 1

1) = 7x-4x+3x
    = 3x+3x
    = 6x

2) = 5xy+15xy-12xy-12xy+2xy
    = 20xy-12xy-12xy+2xy
    = 8xy-12xy+2xy
    = -4xy+2xy
    = -2xy