Caranya kayak gimana??bantuin kerjain dong:( ((soalnya yg dilingkarin ya)).... Question from @KiranaFajri

September 2018 1 22 Report

Caranya kayak gimana??bantuin kerjain dong:(

((soalnya yg dilingkarin ya))

Matrixisme Uji kompetensi 1
1. 6x + 7 = 12
6x = 12 - 7
6x = 5
x = $\frac{5}{6}$ ... (d)

2. $\frac{3x}{2}$ + 5 = 9
$\frac{3x}{2}$ = 9 - 5
$\frac{3x}{2}$ = 4
3x = 4 x 2
3x = 8
x = $\frac{8}{3}$ = $2\frac{2}{3}$ ... (d)

3. 12 - $\frac{5x}{6}$ = 1
$\frac{5x}{6}$ = 12 - 1
$\frac{5x}{6}$ = 11
5x = 11 x 6
5x = 66
x = $\frac{66}{5}$ = $13\frac{1}{3}$ ... (d)

4. 3x + a = 15
jika x = 4, maka:
3(4) + a = 15
12 + a = 15
a = 15 - 12
a = 3 ... (e)

Uji kompetensi 2
1. 2x - 4 = 5x + 8
2x - 5x = 8 + 4
-3x = 12
x = $\frac{12}{-3}$
x = -4 ... (a)

2. 2(x + 5) = 3(2x - 6)
2x + 10 = 6x - 18
6x - 2x = 18 + 10
4x = 28
x = $\frac{28}{4}$
x = 7 ... (e)

3. $\frac{x+2}{3}$ = 5 - $\frac{x}{2}$
$\frac{x+2}{3}$ + $\frac{x}{2}$ = 5
$\frac{2(x+2)}{6}$ + $\frac{3(x)}{6}$ = 5
$\frac{2x+4}{6}$ + $\frac{3x}{6}$ = 5
$\frac{2x+4+3x}{6}$ = 5
2x + 4 + 3x = 30
5x + 4 = 30
5x = 30 - 4
5x = 26
x = $\frac{26}{5}$ = $5\frac{1}{5}$ ... (e)

uji kompetensi 3
1. $\frac{3}{2x}$ = $\frac{1}{x-2}$
3(x - 2) = 1(2x)
3x - 6 = 2x
3x - 2x = 6
x = 6 ... (e)

2. $\frac{4}{x-3}$ = $\frac{2}{x+1}$
4(x + 1) = 2(x - 3)
4x + 4 = 2x - 6
4x - 2x = - 4 - 6
2x = - 10
x = $\frac{-10}{2}$ = -5 ... (a)

3. $\frac{2}{x+1}$ - $\frac{1}{x}$ = $\frac{4}{x}$
$\frac{2}{x+1}$ = $\frac{4}{x}$ + $\frac{1}{x}$
$\frac{2}{x+1}$ = $\frac{5}{x}$
2(x) = 5(x + 1)
2x = 5x + 5
2x - 5x = 5
-3x = 5
x = $\frac{5}{-3}$ = - $1\frac{2}{3}$ ... (a)

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