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3 years ago

Solving linear equations

Mathematics

1 answer:

AlexFokin [52]3 years ago

4 0

Answer:

(x, y ) = ( $\frac{1}{2}$ , $\frac{5}{2}$ )

Step-by-step explanation:

given the 2 equations

4x + 2y = 7 → (1)

y = 5x → (2)

Substitute y = 5x into equation (1)

4x + 2(5x) = 7

4x + 10x = 7

14x = 7 ( divide both sides by 14 )

x = $\frac{7}{14}$ = $\frac{1}{2}$

substitute this value into equation (2)

y = 5 × $\frac{1}{2}$ = $\frac{5}{2}$

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andrew11 [14]

Solution,

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⇒2SinACosB=Sin(A+B)+Sin(A-B)

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2 years ago

- 7/4 = 2/5t Solve for t please: ___

jasenka [17]

First, you had to switch sides of equation.

And it gave us ⇒ $\frac{2}{5}t=-\frac{7}{4}$

Then multiply by five from both sides of equation form.

And it gave us ⇒ $5*\frac{2}{5}t=5(-\frac{7}{4})$

Simplify.

And it gave us ⇒ $2t=-\frac{35}{4}$

Next, divide by two from both sides of equation form.

And it gave us ⇒ $\frac{2t}{2}=-\frac{35}{4/2}$

Finally, simplify.

And it gave us ⇒ $t=-\frac{35}{8}$

Final answer: ⇒ $\boxed{t=-35/8}$

Hope this helps!

And thank you for posting your question at here on brainly, and have a great day.

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