Answer:
See below, there may be more than one answer
Step-by-step explanation:
4(3+1)+2 = 18
(4+2)(3)+1 = 19
(1)(2+3)(4) = 20
(1+2)(3+4) = 21
Answer:
5
Step-by-step explanation:
It is no solution, bc the answer is (0,0)
Answer:

Step-by-step explanation:
