How many 3-digit numbers can you write using only digits 1 and 7 if the digits can repeat?

the number must be 3 digits and less than 200 so the first number is one and the next numbers must be evens so like 2,4,or 6.

Step-by-step explanation:

i hope this helps

answer: this is not a question

step-by-step explanation: this is a answer

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.