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slavikrds [6]
2 years ago
13

Who can solve these three ??

Mathematics
2 answers:
icang [17]2 years ago
5 0

Answer:

1) x = 9

2) y = 16

3) y = -1

Step-by-step explanation:

Do PEMDAS in reverse.

For every equation, your goal is to seperate the variable (x,y, or whatever letter) by itself.

1) 2x-7 = 11

Add 7 to both sides.

2x = 18

Divide both sides by 2.

x = 9

2) \frac{3}{4}y = 12

Divide both sides by 3/4 (which turns into multiplying by 4/3).

<u>Left side</u>

\frac{3}{4}x * \frac{4}{3}\\\\\frac{3}{4}x * \frac{4}{3} = \frac{3*4}{4*3}x\\1x\\x

<u>Right side</u>

<u />12*\frac{4}{3}\\\\\frac{12}{1} *\frac{4}{3}\\\\  \frac{12}{1} *\frac{4}{3} = \frac{12*4}{1*3}\\\\\frac{48}{3}  \\16<u />

<u />

3) 9(y+3) = 18

Remember do PEMDAS in reverse.

Divide both sides by 9.

y+3 = 2

Subtract both sides by 3.

y = -1

Sladkaya [172]2 years ago
4 0
1. X = 9
2. Y=16
3. Y= -1
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