exam Maths Puzzle Numerical Ability

Find values for m and b in the following system so that the solution to the system
is (-3, 4).
5x + 7y = b
mx + y = 22
Thank you

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exam Other Question

Perform the indicated operations> Write fractional answers as mixed numbers or as proper fractions reduced to lowest terms.
-3-(-4)-/4-7/ How do you find the solution and what is the solution to this problem?

4.2 division sign and 15