Thankfully, there is no real GCSE in algebra. But if there was, would you pass?
a – 67a – 67a + 10
Starting with 4a – (3a + 6) you first simplify by removing the brackets, to get 4a – 3a – 6. Subtracting 3a from 4a gives the final answer: a – 6.
b/a is equal to two thirds, a – b is 1 and ab is 6.
Yes, that person must be very good at maths.No, they're lying.
w = 1 works, but if you set w as -1 the above expression works out as -2. The two correct values are 1 and -2.
x > 5x < 5x > 3x < 3
The expression simplifies to 3x > 15, so x > 5.
y = 6y = 7y = 8
8y = 64, so y = 8.
x² + y²2x + y²2x + 2y²
x + x = 2x and y * y = y² so the full expression is 2x + y².
1, 2, 3, 41, 2, 3, 51, 2, 3, 61, 2, 4, 8
In a geometric progression each number is multiplied by the same common factor to get the next term. In the sequence 1, 2, 4, 8 the common factor is 2.
y = x + 10y = 2x – 5y = 10x + 2
The number before the x is the gradient of the line, so y = 2x – 5 is parallel to y = 2x + 10.
For the equation to be true, either x – 4 = 0 or x + 8 = 0.
x could also be -4.
The 2nd term in both sequences is 5.
x=1, y=2x=2, y=2x=2, y=4
If you substitue y=2x into the first equation you get 5x=10, so you know x=2. Then just put that into y=2x to get y=4.
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