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PilotLPTM
3 months ago
15

Solve for y 4.2x - 1.4y = 2.1

Mathematics
2 answers:
Zina [12.3K]3 months ago
3 0

Answer:

The expression for y is:

         y=3x-1.5

Step-by-step solution:

We start with the equation involving x and y given as:

4.2x-1.4y=2.1

The goal is to isolate y, expressing it in terms of x and constants.

Subtracting 4.2x from both sides results in:

          -1.4y=2.1-4.2x

Dividing both sides by -1.4 gives:

y=\dfrac{2.1}{-1.4}-\dfrac{4.2x}{-1.4}\\\\y=-1.5+3x\\\\i.e.\\\\y=3x-1.5

tester [12.3K]3 months ago
3 0
4.2x - 1.4y = 2.1
-1.4y = 2.1 - 4.2x
y = \frac{2.1 - 4.2x}{-1.4}
y = 3x - 1.5 <==
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The standard form of the equation is revealed as ⇒ x + y = 2

Step-by-step elucidation:

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For line MN which passes through (-3, 5) with a slope of -1, the equation formulated is given by

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So, consequently, the y-intercept for line MN is 2

The equation generates in the standard form as

x + y = 2

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