B. Solve by substitution. A group of 48 scouts attended a camping trip. The number of girl scouts in attendance was 12 more than the boy scouts. How many boys and girls attended the camping? Representation: Let x be the number of girl scouts Let y be the number of boy scouts Write in equation: 7. A group of 48 scouts attended the camping trip. 7. 8. The number of girl scouts is 12 more than the boy 8. scouts. 9. Solve one linear equation for x in terms of y. 9. 10.Substitute the first obtained value for x in the other equation to have an equation in y. Solve this to have the y-value. 10. 11. Plug in the value of y to any of the equations in the system to find the corresponding x-value. 12.How many boys and girls attended the camping trip? 11. 12.

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.