15/14 x 2/3 = 30/42 or 5/7
It is: 7 times 7 equals 49
5 = 1 x 5, 21 = 3 x 7 3 x 5 = 15, 1 x 7 = 7, 15 - 7 = 8 so: (5x + 7)(x - 3)
3 x 1/2 = 3/2 or 6/4. If you're adding 7/4 and 3/4 to that, the answer is 16/4, which equals 4.
6/7 - 2/7 = 4/7
Combine like terms, adding/subtracting the coefficients: (5a² + 6a + 2) + (7a² - 7a + 5) = (5+7)a² + (6-7)a + (2+5) = 12a² - a + 7 (5a² + 6a + 2) - (7a² - 7a + 5) = (5a² + 6a + 2) + (-7a² + 7a - 5) = (5-7)a² + (6+7)a + (2-5) = -2a² + 13a - 3
A+5=-5a+5 A=-5a+5-5 (bring one of the 5 over)(not necessary) A=-5a (if big and small letters are the same, A=a=0; if not, when A=35,a=-7)
If you mean: 6a+7 = 5a then the value of a is -7
2b(5a - 7)(5a + 7)
(5a).7 = -23 7(5a) = -23 35a = -23 a = -23/35 a= -0.657 (3 d.p.)
2a-8+4=45-5a 2a-4=45-5a 2a-4+4=45+4-5a 2a+5a=49-5a+5a 7a=49 / by 7 = A=7
5a+5=6a-7
7a + 4 = 5a + 7 7a = 5a + 3 2a = 3 a = 3/2
Oh, come on! 6a - 5a = a, 7 - 5 = 2
5a - 1 = a - 7 4a = -6 a = -1.5
5a + 2 = 7 subtract 2 from both sides: 5a = 5 divide both sides by 5: a = 1
7