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frozen [14]
3 years ago
5

How to do linear equations 27, 28,28,30

Mathematics
1 answer:
Mekhanik [1.2K]3 years ago
6 0
#27.  
First cross multiply
2 (2a-3) = 3 (a-1)
next use the distribute property on both sides
4a - 6 = 3a - 3
combine like terms, subtract 3a from both sides and add 6 to both sides
a = 3

#28
cross multiply
3x = 4, then divide both sides by 3
x = 4/3

#30
add 1/4 to both sides
3/x = 1/2 + 1/4, find a common denominator for the right side fractions
3/x = 2/4 + 1/4 = 3/4
therefore, x = 4
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lesya [120]

I had this question so here's the answer and explanation! :)

Answer:

The answer to your question is the first option :D

Step-by-step explanation:

Original expression

                                -3/8 (-4 + 1/2)

First option    -3/8 (-4)  + (3/8)(1/2)       This option is not equivalent because

                                                             they forgot the negative sign of the

                                                             second term.

Second option (-3/8)(-4) + (-3/8)(1/2)    This option is equivalent to the

                                                              original. Distributive property

Third option    (-3/2)(-3 1/2)                 This option is equivalent to the original

Fourth option  (-3/8)(-3) + (-3/8)(-1/2)  This option is equivalent to the original

HOPE THIS HELPS :)

5 0
3 years ago
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Vadim26 [7]

Answer: D. 32cm


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4 years ago
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Rudik [331]
180=(9X-11)+(4X+1)+(7X-3)
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Can someone help me out? :P
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Answer:D I think

Step-by-step explanation:

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Nutka1998 [239]
Solve for 1 variable
solve for x in second

add 2y to both sides
x=2y-5
sub 2y-5 for x in first equation
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sub
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x=3
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(3,4)
8 0
3 years ago
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