Solve the following system of–2x+5)=21-7x-2y=15

1 answer:

4 0

Let's solve your equation step-by-step.
−
2
x
+
5
=
21
Step 1: Subtract 5 from both sides.
−
2
x
+
5
−
5
=
21
−
5
−
2
x
=
16
Step 2: Divide both sides by -2.
−
2
x
−
2
=
16
−
2
x
=
−
8
Answer:
X=-8

Step 1: Add 2y to both sides.
−
7
x
−
2
y
+
2
y
=
15
+
2
y
−
7
x
=
2
y
+
15
Step 2: Divide both sides by -7.
−
7
x
−
7
=
2
y
+
15
−
7
x
=
−
2
7
y
+
−
15
7
Answer:
x
=
−
2
7
y
+
−
15
7

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Write a verbal expression for 3n - 8.

Alchen [17]

(B) 8 less than the product of 3 and n

Here, we are given an equation 3n - 8

Let us consider each of the options one by one

(A) the product of 3, n and 8 will be written as 24n. Hence this isn't the correct answer.

(B) 8 less than the product of 3 and n will be written as 3n - 8. This matches our equation and hence is the correct answer.

(D) 3 times n less than 8 will be written as 8 - 3n. Thus, this is also eliminated.

Therefore, option B is the correct answer.

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