X=270 units
270 units can be manufactured per month
78.00 = 59.99+0.10x
10.01=0.10x
x= 180.1 so she can send 180 texts plus the 100 free ones for a total of 280 texts
double check: 180 x 0.10 = 18.00 + 59.99 = 77.99
Pairs of corresponding angles have the same measure.
Answer:

Step-by-step explanation:

Divide 3 on both sides of the equation.

