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7x + 2 = -4 7x + 2 - 2 = -4 - 2 7x = -6 7x/7 = -6/7 x = -6/7
4x - 7 = 5 + 7x x = -4
7x + 8 = 36 - 8 = - 8 -------------- 7x = 28 7x/7 = 28/7 x = 4
7x-4=9x+10-14=2xx=-7
Very little factoring. 7X + 4X X(7 + 4) ======
7(x + 4)
(7x - 4)(7x + 4).
It is an algebraic expression which is equivalent to 7x - 118.
7x = 3 x = 3/7
(7x + 4) = (3x + 7) Subtract (3x + 4) from both sides of the equation. (7x + 4) - 3x - 4 = (3x + 7) - 3x - 4 4x = 3 x = 3/4 Check: (7x + 4) = 7 (3/4) + 4 = (21/4) + 4 = (21/4) + (16/4) = 37/4 (3x + 7) = 3 (3/4) + 7 = (9/4) + 7 = (9/4) + (28/4) = 37/4 Yay.
7x + 28
7x + 7 = 7(x + 1)