5X - 2Y X = 9 Y = 4 5(9) - 2(4) 45 - 8 37 is the value
5x + 3 = -12 5x =-12-3 =-15 x = -3
-5x + y = -12- 3x + 6y = -12Since both of expressions have a value of -12, their sum is - 24. This is true only whenx = 20/9 and y = -8/9.-5x + y = -12y = 5x - 12- 3x + 6y = -12-3x + 6(5x - 12) = -12-3x + 30x - 72 = -1227x = 60x = 60/27x = 20/9y = 5x - 12y = 5(20/9) - 12y = 100/9 - 12y = (100 - 108)/9y = -8/9
It is impossible to give the value of t when it is not defined.
The value of that type of expression depends on the value of the variable, in this case, "x".
-13 Plug 5 in and multiply it by -5 which equals -25 12 - 25 = -13
5x=4012y=84124
-42
5X - 2Y X = 9 Y = 4 5(9) - 2(4) 45 - 8 37 is the value
5x - 3 = 12 Add 3 to both sides: 5x = 15 Divide both sides by 5: x = 3
317
Though 10x +24 is an expression and it can not be evaluate, we can write 10x+24=2 • (5x + 12)
5x + 3 = -12 5x =-12-3 =-15 x = -3
When x equals 8, the value of 5x would be 5 times 8, which is 40.
3(x + 2) = 5x - 12 3x + 6 = 5x - 12 6 = 2x - 12 6 + 12 = 2x x = 9
6x - 3x = 5x - 10x + 12 6x - 3x - 5x + 10x = 12 8x = 12 8x/8 = 12/8 x = 12/8 = 3/2 x = 1.5
Here is the work for that problem: 5x+ 2=12 5x= 12-2 5x=10 x= 2