Kayla's age is 3 less than twice her brothers age. kayla's is 13. how old is her brother?

let x is her brother's age

Kayla's age is 3 less than twice her brothers age: 2x - 3

and

Kayla is 13

so

2x - 3 = 13

add 3 to both sides

2x - 3 + 3 = 13 + 3

simplify

2x = 16

divide both sides by 2

2x/2 = 16/2

x = 8

So her brother's age is 8 years old

proof:

2x - 3

= 2 (8) - 3

= 16 - 3

= 13

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)

answer: the two figures are congruent.

step-by-step explanation: they're congruent because figure efgh is reflected across the x and y axis but it was also rotated.

hope it !