An office supply store in san diego sells 7 writing tablets and 4 pens for $6.40 also two tablets and 19 pens cost $5.40 find the price of each

7t + 4p = 6.40

2t + 19p = 5.40

Let’s substitute equation 1 in equation 2

T = (6.40 - 4p) / 7

2 (6.4-4p) / 7)) + 19p=5.4

(12.8-8p) / 7 + 19p = 5.5

12.8-8p + 133p = 38.5

125p = 25.7

P = 0.21

Tablets = 0.79