5x - 17 = x + 7 4x - 17 = 7 4x = 24 x = 6 Check it. 30 - 17 = 13 It checks.
If: x = 7 Then: y = (2*7)+3 = 17 And: 5x+y = (5*7)+17 = 52
2x + 7 + 5x - 4 - x = (2x + 5x - x) + (7 - 4) = 6x + 3
10x+7 = 5x+32 10x-5x = 32-7 5x = 25 x = 5
If: 10x+7 = 5x+22 Then: 10x-5x = 22-7 And: 5x = 15 So: x = 3
5x - 17 = x + 7 4x - 17 = 7 4x = 24 x = 6 Check it. 30 - 17 = 13 It checks.
If: x = 7 Then: y = (2*7)+3 = 17 And: 5x+y = (5*7)+17 = 52
5x+3 = -17 5x = -17-3 5x = -20 x = -4
2x + 7 + 5x - 4 - x = (2x + 5x - x) + (7 - 4) = 6x + 3
5x-4y+9y+x-9+7 = 5x + x - 4y + 9y - 9 + 7 = 6x + 5y - 2 ■
Think of this a 12 x-rays + 5 x-rays Makes 17 x-rays. 12x+5x=17x
If: 5x = 4x+7 Then: 5x-4x = 7 And: x = 7
10x+7 = 5x+32 10x-5x = 32-7 5x = 25 x = 5
If: 10x+7 = 5x+22 Then: 10x-5x = 22-7 And: 5x = 15 So: x = 3
Let, f (x) = - 5x - 9 Therefore, f(x) + 7 = - 5x - 9 + 7 f(x) + 7 = - 5x - 2
5x + 17 = 7x - 123 123 + 17 = 7x - 5x 140 = 2x x = 140 ÷ 2 x = 70
4x-9(x plus 1)7-5x?