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Kay [80]
3 years ago
15

1. Four times a number minus twenty-one is the same as six times

Mathematics
1 answer:
Ganezh [65]3 years ago
7 0

Answer: -16

Step-by-step explanation:

Let the number be y

Four times a number minus twenty-one can be written as:

(4 × y) - 21 = 4y - 21

Six times the number plus eleven can be written as:

(6 × y) + 11 = 6y + 11

Combining both equations will give:

4y - 21 = 6y + 11

4y - 6y = 11 + 21

-2y = 32

y = 32/-2

y = -16

The number is -16

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\huge \tt \color{pink}{A}\color{blue}{n}\color{red}{s}\color{green}{w}\color{grey}{e}\color{purple}{r }

\large\underline{  \boxed{ \sf{✰\: Concept }}}

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\large\underline{  \boxed{ \sf{✛\: Assumptions\:✛ }}}

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\large\underline{  \boxed{ \sf{✰\: let's\:solve }}}

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\rm { \pink➾ \:( 3x  - 4) + (3x - 8) = 180} \\ \rm { \pink➾}arranging \: and \: solving \: like \: terms \\ \rm { \pink➾ \: 3x + 3x - 4 - 8 = 180} \\ \rm { \pink➾ \: 6x - 12 = 180} \\ \rm  { \pink➾6x = 180  + 12}

\qquad \qquad\rm { \pink➾6x  = 192} \\ \qquad\qquad\rm { \pink➾ \: x =  \frac{ \cancel{192}}{ \cancel6} } \\ \qquad\qquad\rm { \pink➾x = 32}

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\boxed{↪\underline{  \boxed{ \rm{\: x = 32\green✓}}}↩}

\rule{70mm}{2.9pt}

Hope it helps !

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Step-by-step explanation:

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