3x/5-0.5 = 1.9
+0.5 +0.5
————————
3x/5 = 2.4
x5 x5
___________
3x = 12
x = 4
True is the answer
Hope this helps!
Answer:
x= 11
Step-by-step explanation:
4x+5/7 =2x-1/3
multiply both of the equation by 7 first
4x+5/7 times 7 = 2x-1/3 times 7
4x+5= (2x-1)7/3
now multiply 3 to both sides
3(4x+5)= (2x-1)7/3 times 3
3(4x+5)= (2x-1)7
now you should distribute on both sides
(4x times 3)+(5 times 3)= (2x times 7)-( 1 times 7)
12x+15= 14x-7
subtract 12x from both sides
12x-12x+15= 14x-12x-7
15= 2x-7
add 7 to both sides
15+7= 2x-7+7
22= 2x
divided both sides by 2
22/2 = 2x/2
11=x
AC = 39
Side Am/mB (x + 1)/(2x - 5)
Side Am/mC (x + 21)/(2x + 21)
m is the point where the parallel line is.
AB = AC
(x+1)/(2x -5) =(x +21)/(2x+21)
Cross multiply.
(x+1)(2x+21)=(2x-5)(x+21)
2x^2+23x+21=2x^2+37x-105
Subtract 2x^2 from both sides.
23x+21=37x-105
Subtract 23x from both sides.
21= 14x -105
Add 105 to both sides
126 = 14x
Divide both sides by 14
x = 9
Plug 9 back in for x in
2x + 21
2(9) + 21 = 39
2 (-3/4) =-6
2 multiplied by -3 divided by 4 equals -6