book Maths Puzzle Numerical Ability

x+2x+5=x+19 please help my daughter understand how to do this type of math she is 10 yrs old thank you

Read Solution (Total 0)

book Other Question

I'm not sure how to figure out how to graph y > 1 - x. My teacher says to follow these steps but I don't fully understand.
1)Solve for y and graph the boundary line.
2)Pick a poi a^2-9ab+81b^2