Question

78 = -2(m + 3) + m ? can someone show my how

Answer 1

sure
78 = -2(m + 3) + m
first we need to get rid of the parentheses. to do this we multiply by the outside number. then we get...

78 = -2m + -6 + m

now combine the like terms for m...
78= -m - 6
now we need to get m by itself so we add 6 to both sides...
84=-m
we now have -m = 84 or m=-84

any questions/comments?

Answer 2

where does the -6 come from

Answer 3

when we take away the parentheses we multiply the outside number by each inside number... -2X3=-6

Answer 4

ok i think i understand a little better thanks :).