jacob has m nails and twice as many bolts as nails. he buys another 20 nails and 30 bolts. find the total number of nails and bolts Jacob has now

Respuesta :

n = nails and b = bolts  start    n and b (2n)  add 20n and 30(2n) 2n is just the quantity of bolts expressed in amount of nails n + 20 nails2n bolts + 30 bolts  = (2n + 30)   b