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ollegr [7]
3 years ago
12

−1.2(3x − 3) = 4(3x +0.9)

Mathematics
2 answers:
beks73 [17]3 years ago
7 0

Answer:

x=0

Step-by-step explanation:

-3.6x+3.6=12x+3.6

-3.6x-12x=3.6-3.6

--15.6x=0

x=0/15.6

x=0

Cloud [144]3 years ago
5 0

Answer:

x = 0

Step-by-step explanation:

Solve for x:

-1.2 (3 x - 3) = 4 (3 x + 0.9)

Hint: | Write the linear polynomial on the left hand side in standard form.

Expand out terms of the left hand side:

3.6 - 3.6 x = 4 (3 x + 0.9)

Hint: | Write the linear polynomial on the left hand side in standard form.

Expand out terms of the right hand side:

3.6 - 3.6 x = 12 x + 3.6

Hint: | Move terms with x to the left hand side.

Subtract 12 x from both sides:

3.6 + (-3.6 x - 12 x) = (12 x - 12 x) + 3.6

Hint: | Combine like terms in -3.6 x - 12 x.

-3.6 x - 12 x = -15.6 x:

-15.6 x + 3.6 = (12 x - 12 x) + 3.6

Hint: | Look for the difference of two identical terms.

12 x - 12 x = 0:

3.6 - 15.6 x = 3.6

Hint: | Isolate terms with x to the left hand side.

Subtract 3.5999999999999996` from both sides:

(3.6 - 3.6) - 15.6 x = 3.6 - 3.6

Hint: | Look for the difference of two identical terms.

3.6 - 3.6 = 0:

-15.6 x = 3.6 - 3.6

Hint: | Look for the difference of two identical terms.

3.6 - 3.6 = 0:

-15.6 x = 0

Hint: | Divide both sides by a constant to simplify the equation.

Divide both sides of -15.6 x = 0 by -15.6:

(-15.6 x)/(-15.6) = 0/(-15.6)

Hint: | Any nonzero number divided by itself is one.

(-15.6)/(-15.6) = 1:

x = 0/(-15.6)

Hint: | Zero divided by any non-zero number is zero.

0/(-15.6) = 0:

Answer: x = 0

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hi brainly user! ૮₍ ˃ ⤙ ˂ ₎ა

⊱┈────────────────────────┈⊰

\large \bold {ANSWER}

  • \large \boxed { \large \sf \green{ 80 km/h = 22.22 m/s }}
  • \large \boxed { \large \sf \green{ 120 km/h = 33.33 m/s }}

\large \bold {SOLUTION}

The first thing we must do is convert kilometers to meters. We will do this by multiplying by 1,000, since 1 km corresponds to 1,000 meters.

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Now that we've done that, let's divide the values by 3,600, because an hour is 60 minutes, and each minute is 60 seconds, so 60*60 is 3,600.

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Hence, 80 km/h = 22.22 m/s, 120 km/h = 33.33 m/s

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