Question

A. Write an equation that can be used to determine the number of text messages Jacob and Roberto can send for their plan to cost the same
B. Solve the equation form part A to find the number of text messages each person can send for their costs to be the same

Answer 1

Y = 0.15t + 20
y = 0.10t + 30

0.15t + 20 = 0.10t + 30 <== ur equation
0.15t - 0.10t = 30 - 20
0.05t = 10
t = 10 / 0.05
t = 200 <== each person can send 200 texts for their plans to cost the same