So y+x=2 x-y=4 one way is subsituteion where yousubisutte one of the number for another exg
x-y=4 add y to both sides x=y+4 subsitute y+4 for x in x+y=2 y+4+y=2 2y+4=2 subtract 4 from both sides 2y=-2 divide both sides by 2 y=-1 subsiutte x+y=2 x-1=2 x=3
or elimination
x+y=2 x-y=4 add the two equations and cancel the y terms
x+x+y-y=2+4 2x=6 divide both sides by 2 x==3 subsitute x+y=2 3+y=2 y=-1
No. Writing it as a biconditional would mean that "If a number is odd, then it is a prime number" is also true. The original statement is true, but the converse is false.
you have to be at least 48 inches so the shortest person that can ride it is 48 and she is 39 so you minus the 39 from 48 and you will get the inches she needs to grow
