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Hi! Can anybody help me with these problems? I have to do 2 step equations.

1. 3.8x + 5.2x - 6.7 = 11.3
2. 7.8y - 4.9 - 5.4y = 2.3
3. 2/3x - 5 = 1
4. 7/5y = 3 - 1/5

There are pictures below for the ones that have fractions ( 3 and 4)

Hi Can anybody help me with these problems I have to do 2 step equations 1 38x 52x 67 113 2 78y 49 54y 23 3 23x 5 1 4 75y 3 15 There are pictures below for the class=
Hi Can anybody help me with these problems I have to do 2 step equations 1 38x 52x 67 113 2 78y 49 54y 23 3 23x 5 1 4 75y 3 15 There are pictures below for the class=

Respuesta :

1) 3.8x + 5.2x - 6.7 = 11.3
9x = 11.3 + 6.7
9x = 18
x = 18/9
x = 2

2) 7.8y - 4.9 - 5.4y = 2.3
2.4y = 7.2
y = 7.2/2.4
y = 3

3)

[tex] \frac{2}{3} x - 5 = 1[/tex]
[tex] \frac{2}{3} x = 5 + 1[/tex]
[tex] \frac{2}{3} x = 6[/tex]

Multiply by 3 by both sides:

[tex]3 \times \frac{2}{3} x = 3 \times 6[/tex]

Simplify:

2x = 18
x = 18/2
x = 9

4)

[tex] \frac{7}{5} y = 3 - \frac{1}{5} [/tex]

Do lowest common denominator:

[tex] \frac{7}{5} y = \frac{(5 \times 3) - 1}{5} [/tex]
[tex] \frac{7}{5} y = \frac{15 - 1}{5} [/tex]
[tex] \frac{7}{5} y = \frac{14}{5} [/tex]

Simplify by 5 by both sides:

[tex]7y = 14[/tex]
[tex]y = \frac{14}{7} [/tex]
[tex]y = 2[/tex]
rmartens2204

Answer:


Step-by-step explanation:

for question number one you want to first combine like terms:

  1.   9x-6.7=11.3  
  2. 9x=18
  3. x=2

for number 2 you should teh smame:

  1. 2.4y-4.9=2.3
  2. 2.4y=7.2

so as long as you combine like terms then proceed to solve you should get the right answers

                                               

   

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