Can somebody please help me and how do you do this step by step and I need the formula for this please.

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18

Ineed to know the answer to this algebra question.