Hi, I've recently started doing proofs in math, and I've gotten through most of it, but I am still absolutely clueless when it c
omes to these questions; could someone please help and explain to me how this works??
Question 1: What is the reason for #4?
Given: 4x + 1 = 6x - 2, Prove: x = 3/2
(1) 4x + 1 = 6x - 2
(2) 4x + 3 = 6x
(3) 3 = 2x
(4) 3/2 = x ?
(5) x = 3/2
Question 2:
What is the reason for #3?
Given: 3x - 4 = 2(x + 8), Prove: x = 20
(1) 3x - 4 = 2(x + 8)
(2) 3x - 4 = 2x + 16
(3) 3x = 2x + 20 ?
(4) x = 20
PLEASE HELP I AM DESPERATE TO UNDERSTAND!!
1 answer:
<span>4x + 1 = 6x - 2, Prove: x = 3/2
-4x =-4x
1 =2x-2
-1 =-1
0 =2x-3
0 =2x+(-3)
2/3=2/3
</span><span>3x - 4 = 2(x + 8), Prove: x = 20
3x- 4 =2x+16
+4 =+4
3x =2x+20
-2x =-2x
1x =20
</span><span>
</span>
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