The number of girls in a school is 57 less than 2 times the number of boys in the school There are 143 girls in this school how many boys are in the school

-43

Step-by-step explanation:

143 equal number of girls. The boys is unknown so they'll be x and the question says 2 times. So the equation would be 143=57-2x.

143=57-2x

so subtract 57 from both sides (57 and 143).

86=-2x

divide each side by - 2

so x = - 43