3m+n=7
m+2n=9
selesaikan setiap persamaan serentak menggunakan kaedah penghapusan

Measure a and b and find their sum. how are the angles related?

At a book fair, joe bought 24 books at 3 for $5 and had $2 left. how much money did he have at first?

The sum of two numbers is 0. twice the smaller number subtracted from 3 times the larger number is 10. let x represent the larger number and y represent the smaller number. what is the equation