If i write 3x3 can we solve this problem using addition

Ineed asap graph the system of equations 2x+y=5; 14+7y=35

The coordinate grid shows points a through k. which points are solutions to the system of inequalities listed below? 2x+ ys 10 2x 4y < 8 oa c, d, k o e, f. g, j oa, c, d, h, k oe, f. g, h, j

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?