10x ÷ 2 = 7 → 10x = 2 × 7 → x = (2 × 7) ÷ 10 → 2x = 2 × (2 × 7) ÷ 10 = 2.8
2x+52=0 =>2x= -52 =>x= -52/2 =>x= -26
4x - 7 = 2x + 5 2x - 7 = 5 2x = 12 x = 6.
-3(x-5)=2x
6 - (2 x 7) - (3 x (-9)) = 19
10x ÷ 2 = 7 → 10x = 2 × 7 → x = (2 × 7) ÷ 10 → 2x = 2 × (2 × 7) ÷ 10 = 2.8
2x-6=7, x=?
2x + 7 = 1 Therefore, 2x = -6 x = -6/2 x = -3
2x+52=0 =>2x= -52 =>x= -52/2 =>x= -26
2x + 7 + 5 = 2x + 12 = 2*x + 2*6 = 2*(x+6)
7/2x = 3 Multiply both sides by 2x: 7 = 3*2x = 6x Divide both sides by 6 = 7/6 = x ie x = 1.1666...
4x - 7 = 2x + 5 2x - 7 = 5 2x = 12 x = 6.
-3(x-5)=2x
x2 + 2x -6 = 0 x2 + 2x + 1 = 7 (x + 1)2 = 7 x = -1 ± √7
-7 + 2(x-3) = -7+2x-6 = 2x - 13
6 - x + 7 - 3x - 5 = -2x - 10 ∴ x + 3x - 2x = 6 + 7 - 5 + 10 ∴ 2x = 18 ∴ x = 9
4X - 7 = 2X + 5 subtract 2X from each side 4X - 2X - 7 = 2X - 2X + 5 2X - 7 = 5 add 7 to each side 2X - 7 + 7 = 5 + 7 2X = 12 divide both sides integers by 2 (2/2)X = 12/2 X = 6 --------------check in original equation 4(6) - 7 = 2(6) + 5 24 - 7 = 12 + 5 17 = 17 -----------checks