x=5
4, -5
If your expression is 5x + 4 = ? and x = 3, then the answer is 19. If the expression is 5(x + 4) = ? and x = 3, then the answer is 35.
9 plus 7 equals 144. Generally, x plus y = x(x+y).
2 squared plus 2 x 3 = 10, 7 squared plus 7 x 2 = 63, 6 squared plus 6 x 5 = 66,8 squared plus 8 x 4 = 96 so 9 squared plus 9 x 7 = 81 + 63 = 144.
2x-4
If its x+4x+5 then: 5x+5
x+4x+5=5x+5
If X+Y=5;X=4, then x=4 and y=1
(8 + 4) x 5...
x = 4
x=4
5. Just do 9 minus 4. 5 plus 4 equals 9
5
5
x=4 y=5 9x+7y=?? Replace: 9(4)+7(5)= 71
2x+5=3x+1 -x=-4 x=4