Question

1. 4x - 5 = 7
2. 3x + 7 = 4
3. -x + 8 = 2
4. 5 - 7x = -16
5. 10x = 8x - 6

[tex] \tt \color{red}saya \: kembali[/tex]
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Answer 1

Verified answer

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[tex]\huge\tt\color{FF6666}{P}\color{FFB266}{E}\color{B2FF66}{N}\color{66FF66}{Y}\color{66FFFF}{E}\color{66B2FF}{L}\color{6666FF}{E}\color{B266FF}{S}\color{FF0000}{A}\color{FF0000}{I}\color{FF9999}{A}\color{FFCC93}{N}[/tex]

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Nomor 1

4x - 5 = 7

4x - 5 + 5 = 7 + 5

4x = 12

4x/4 = 12/4

x = 3

Nomor 2

3x + 7 = 4

3x + 7 - 7 = 4 - 7

3x = -3

3x/3 = -3/3

x = -1

Nomor 3

-x + 8 = 2

-x + 8 - 8 = 2 - 8

-x = -6

(-1)(-x) = (-1)(-6)

x = 6

Nomor 4

5 - 7x = -16

5 - 7x + 7x = -16 + 7x

5 = 7x - 16

5 + 16 = 7x - 16 + 16

21 = 7x

21/7 = 7x/7

3 = x

[tex]\sf \tiny \red{@BranlySuhuPTK}[/tex]

Nomor 5

10x = 8x - 6

10x - 8x = 8x - 6 - 8x

2x = -6

2x/2 = -6/2

x = -3

Jadi, solusi untuk masing-masing persamaan adalah :

1. x = 3

2. x = -1

3. x = 6

4. x = 3

5. x = -3

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[tex]\colorbox{black}{\blue{ \boxed{ \tt{\color{aqua}{Matematika}}}}}[/tex]

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[tex]\colorbox{black}{\blue{\boxed{\colorbox{black}{\blue{\bf{answered \: by \: BranlySuhuPTK}}}}}}[/tex]

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Answer 2

Jawaban:

1. x = 3
2. x = -1
3. x = 6
4. x = 3
5. x = -3

Penjelasan dengan langkah-langkah:

Nomor 1

[tex]\begin{aligned}4x - 5 &= 7 \\ 4x - 5 \blue{ + 5}&=7 \blue{ + 5} \\ 4x&=12 \\ 4x \blue{ \times \frac{1}{4}}&=12 \blue{ \times \frac{1}{4} } \\x&=3 \end{aligned}[/tex]

Nomor 2

[tex]\begin{aligned}3x + 7&= 4 \\ 3x + 7 \blue{ - 7}&=4 \blue{ - 7} \\ 3x&= - 3 \\ 3x \blue{ \times \frac{1}{3}}&= - 3 \blue{ \times \frac{1}{3} } \\x&= - 1\end{aligned}[/tex]

Nomor 3

[tex]\begin{aligned} - x + 8 &=2 \\ - x + 8 \blue{ - 8}&=2\blue{ - 8} \\ - x&= - 6 \\ - x \blue{ \times( - 1)}&= - 6 \blue{ \times( - 1) } \\x&=6 \end{aligned}[/tex]

Nomor 4

[tex]\begin{aligned}5 - 7x&= - 16 \\5 - 7x \blue{ - 5}&= - 16\blue{ - 5} \\ - 7x&= - 21\\ - 7x \blue{ \times - \frac{1}{7}}&= - 21\blue{ \times - \frac{1}{7} } \\x&=3 \end{aligned}[/tex]

Nomor 5

[tex]\begin{aligned}10x &=8x - 6 \\10x \blue{ - 8x}&=8x - 6\blue{ - 8x} \\ 2x&= - 6 \\2x \blue{ \times \frac{1}{2}}&= - 6 \blue{ \times \frac{1}{2} } \\x&= - 3 \end{aligned}[/tex]