no it;s not the answer is 2
7-1=6
yes. think of 6/12 plus 1/12. that is 7/12!
20
(1, 1)
6+1 equals 7. Plus 3 equals 10. Plus 4 equals 14.
4 plus 3 equals 7
7=x+1 6=x
20
As written, that is true. (7 - 1) + 8 = 7 - (1 + 8) is not true.
42
(3, 1)
-2x + 3y = -7 3x + y = 16 simultaneous equations. Elimination a letter. Arbitrarily select 'y' Hence multiply the bottom eq'n by ' -3' Hence -2x + 3y = -7 -9x - 3y = -48 Add the eq'ns/ -11x = =55 x = -55/-11 = 5 When x = 5 , substitute into either eq'n for 'y' -2(5) + 3y = -7 -10 + 3y = -7 3y = 3 y = 1 Hence answer in ( x,y) fpr, is ( 5,1).