Answer:
x = 10
Step-by-step explanation:
Step 1: Define
f(x) = -3x + 51
g(x) = 3x - 9
f(x) = g(x)
Step 2: Set up equation
f(x) = g(x)
-3x + 51 = 3x - 9
Step 3: Solve for <em>x</em>
51 = 6x - 9
60 = 6x
x = 10
Step 4: Check
f(10) = -3(10) + 51
f(10) = -30 + 51
f(10) = 21
g(10) = 3(10) - 9
g(10) = 30 - 9
g(10) = 21
f(10) = g(10) = 21
It would be 2 to the 12 power to get 4096
4x - 8 + 6x + 13 = 90
4x + 6x = 90 + 8 - 13
10 x = 85
10x/10 = 85/10
x = 8.5
Answer:
x= -2, x= +11
Step-by-step explanation:
I hope this is right!
To factorise, we need two numbers that add to make -9 and multiply together to make -22.
2 - 11 works, so we put it in the brackets in this order.
(x + 2) (x - 11)
so x + 2 = 0 and x - 11 =0
but we could also simplify this to say that x could be either -2 or + 11.
I hope this helps.
Have a lovely day.