Using the chinese remainder theorem, solve the congruence
x 15 (mod 42)
x 5 (mod 19)

19 and 42 are coprime, so we can use the CRT right away. Start with

Taken mod 42, we're left with a remainder of 19. Notice that

so we need to multiply the first term by 3 to get the remainder we want.

Next, taken mod 19, we're left with a remainder of 4. Notice that

so we need to multiply the second term by 6.

Then by the CRT, we have

so that any solution of the form is a solution to this system.

answer: i can’t tell you that

step-by-step explanation:

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5