Answer:
a and f
Step-by-step explanation:
a. x + 3 = 5x - 4
x - 5x = -4 - 3
-4x = -7
x = -7/-4
x = 7/4
b. x - 3 = 5x + 4
x - 5x = 4 - 3
-4x = 1
x = -1/4
c. 2x + 8 = 5x - 3
2x - 5x = -3 - 8
-3x = -11
x = -11/-3
x = 11/3
d. 10x + 6 = 2x - 8
10x - 2x = -8 - 6
8x = -14
x = -14/8
e. 10x - 8 = 2x + 6
10x - 2x = 6 + 8
8x = 14
x = 14/8
f. 0.3 + x/10 = 1/2x - 0.4
3/10 + x/10 = 1/2x - 4/10
x/10 - 1/2x = -3/10 - 4/10
x/10 - 5/10x = -7/10
-4x/10 = -7/10
-4x = -7
x = -7/-4
x = 7/4
Hey there,
5x + 6 = 66
5x = 66 - 6
5x = 60
x = 60 / 5
= 12
Whenever a number crosses a equal sign it changes into its opposite - for example when 5 crosses the equal sign, it become -5.
Hope this helps :))
~<em>Top♥</em>
Answer:
The roots of any quadratic equation is given by using: x = [-b +/- sqrt(-b^2 - 4ac)]/2a. Write down the quadratic in the shape of ax^2 + bx + c = zero. If the equation is in the shape y = ax^2 + bx +c, honestly replace the y with zero. that is achieved because the roots of the equation are the values where the y axis is same to 0.
Yes -4 is a interference number
