-4 - 3= Please help if you know the answer please explane??
2 answers:
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Answer:
x = 3
Step-by-step explanation:
Δ BDE and Δ BAC are similar triangles, thus the ratio of corresponding sides are equal, that is
=
, substitute values
=
( cross- multiply )
4(3x + 5) = 7(x + 5) ← distribute parenthesis on both sides )
12x + 20 = 7x + 35 ( subtract 7x from both sides )
5x + 20 = 35 ( subtract 20 from both sides )
5x = 15 ( divide both sides by 5 )
x = 3
To solve this equation we must first plug in 5 for x.
<span> (5 - 4x)
</span>↓
(5 - 4 · 5)
The next step would be to multiply 4 by 5 to get rid of the parenthesis within our main parenthesis.
(5 - 4 · 5)
(5 - 20)
The next step would be to subtract both of the numbers within the parenthesis.
(-15)
Now we must multiply.
- · 15 = - 
-
Now we simplify our answer to get our final answer.
-5
</span>↓
The next step would be to multiply 4 by 5 to get rid of the parenthesis within our main parenthesis.
The next step would be to subtract both of the numbers within the parenthesis.
Now we must multiply.
-
-
Now we simplify our answer to get our final answer.
-5