Answer:
Top right answer
Step-by-step explanation:
He added the -x to 4x when he should have subtracted.
Answer:
x³= y^9
x = (y^9)^(1/3)=y³
Step-by-step explanation:
Answer:
x = 5
Step-by-step explanation:
Ordinarily, one would not need the distributive property to solve this equation. It is quickly and easily solved by making use of the multiplication property of equality: multiply both sides of the equation by 1/3.
3x(1/3) = 15(1/3)
x = 5
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To use the <em>distributive property</em>, we need the sum of two terms that have a common factor. We can get that form by subtracting 15 from both sides of the equation (subtraction property of equality):
3x - 15 = 15 - 15 . . . . subtract 15
3x -15 = 0 . . . . . . . . .simplify
Now, we can apply the distributive property to remove a factor of 3:
3(x -5) = 0
And we can use the multiplication property of equality to multiply by 1/3:
3(1/3)(x -5) = 0(1/3)
x -5 = 0 . . . . . . . . . . simplify
Finally, we can add 5 to both sides of the equation (addition property of equality):
x -5 +5 = 0 +5
x + 0 = 5 . . . . . . simplify
x = 5 . . . . . . . . . .simplify more
Answer:
x=39, y = 5 and z = -4.
Step-by-step explanation:
x + y - 5z = 24
y + z = 1
z = -4
Plug z = -4 into the second equation:
y + -4 = 1
y = 5.
Now plug x = -4 and y = 5 into the first equation:
x + 5 - 5*4 = 24
x = 24 - 5 + 20
x = 39.
