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5 votes
PLEASE HELP!!!
SOMEONE!!!

PLEASE HELP!!! SOMEONE!!!-example-1
User Ilansch
by
7.8k points

2 Answers

3 votes
The answer is (7,0).
Let us try to solve this:

3a -4b =21
Let us substitute he first number, that is, 7 in place of ‘a’ and 0 in place of ‘b’.

The answer,
3(7) - 4(0) = ?
21 - 0 = 21
Therefore, the correct option is (7,0) as none of the other options fit the given equation.
User Thomas Hofmann
by
8.7k points
5 votes

Answer:

7,0

Explanation:

Let's solve for a.

3a−4b=21

Step 1: Add 4b to both sides.

Step 2: Divide both sides by 3

Let's solve for b.

3a−4b=21

Step 1: Add -3a to both sides.

Step 2: Divide both sides by -4.

User Dylan Kirkby
by
8.3k points

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