To solve the expression (7a + 4b - 1), you typically need to know the values of (a) and (b). Once you have those values, you can substitute them into the expression and perform the arithmetic to find the result. If no specific values are given for (a) and (b), the expression remains in its simplified form.
2a-6a-a=b+4b-4b -5a=5b-4b -5a=1b a=-5 b=1
9a + 1
1/4
ab + 4 + a + 4b factors to (a + 4)(b + 1)
Since b2 is doubled by adding 3, b2 equals 3. 1/2 of that is b, hence b=1-1/2.
4b - 1 = -4 + 4b + 3first, simplify and add together what you can.4b - 1 = -1 + 4b4b = 4bbecause 4b is always equal to 4b, the answer is infinite.
Clearly, there are some signs missing. So let's try the four possibilities for the second terms: 1. + and + 3a + 4b = 7a + 4b Subtract 4b from each side: 3a = 7a Subtract 3a from each side: 0 = 4a Answer : a = 0, b indeterminate (ie can have any vaue). 2. + and - 3a + 4b = 7a - 4b Subtract 4b from each side: 3a = 7a - 8b Subtract 7a from each side: -4a = -8b or 4a = 8b Answer: a = 2b 3. - and - 3a - 4b = 7a - 4b Add 4b to each side: 3a = 7a Subtract 3a from each side: 0 = 4a Answer : a = 0, b indeterminate (ie can have any vaue). 4. - and + 3a - 4b = 7a + 4b Add 4b to each side: 3a = 7a + 8b Subtract 7a from each side: -4a = 8b or 4a = -8b Answer: a = -2b Can't do better than that with the information available.
identity.
Well if it is worded right then 4xb-1+(-4)+4b=4b-1-4+4b=4b+4b-1-4=8b-5
2a-6a-a=b+4b-4b -5a=5b-4b -5a=1b a=-5 b=1
7a-17 = 4a+1 7a-4a = 1+17 3a = 18 a = 6
9a + 1
The answer to 6b plus 7 times 5-4b plus 1 equals 38. This is taught in math.
1/4
It is: 7a+1 when simplified
I'll assume the missing signs are pluses. 7a^2 - 12a + 14
ab + 4 + a + 4b factors to (a + 4)(b + 1)