(2x-7)+(4x+3)=112 what is the value for x

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

What term makes it inconsistent y=2x - 4

Measures of the angle of r, 31 s (x+4) t (3x+9)