3x plus -5 equal 7. so x is 4 so 3times 4 is 12-5 will equal 7.
If: 3x-7+x = 5 Then: x = 3
if 3x+5=x+19 then x=7
3x+7=2x-5 x=-12
3x + 2 + 2x = 7; 3x + 2x = 5x, so 5x + 2 = 7; 7-2=5, so 5x=5. 5x divided by 5 and 5 divided by 5 equals 1, so x equals 1.
2x2 equals 5
3x - 8 = 7 so x = 5
x=-5
x = 5
2x+12-3x = 5 2x-3x = 5-12 -x = -7 x = 7
-3x + (-18) = 2x + 7 +18 +18 -3x = 2x +25 -2x -2x -5x = 25 ----- ----- -5 -5 x=-5 *------- equals a division line
-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).
(-1, 5)