Por la compra de 18 lapices y 35 lapiceras se pagaron $282. Si se hubiesen comprado 25 lapices y 16 lapiceras iguales, se habria pagado $196. ¿cuanto cuesta cada lapiz? ¿y cada lapicera?

can you take a photo of the screen?

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x

the answer is b.6

step-by-step explanation: