Inii kakkk tlingg satu!​

6)

t × 4 – 12 = 4

4t = 4 + 12

4t = 16

t = 4

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t × 2 = 4 × 2 = 8

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7)

<B = <C = x

<A +<B + <C = 180°

x – 42° + x + x = 180°

x + x + x = 180° + 42°

3x = 222°

x = 74°

Sudut B = x = 74°

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8)

L = p + l + p + l

140m = 2(p + l)

140m ÷ 2 = p + l

70m = p + 30m

70m – 30m = p

40m = panjang

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9)

5(1-2x) = 45

5 – 10x = 45

– 10x = 45 -5

– 10x = 40

10x = -40

x = -4

x – y = 10

-4 – y = 10

– y = 10 + 4

– y = 14

y = -14

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10)

x + 2x – 3 = 90°

3x = 90° + 3

3x = 93°

x = 31°

Sudut 2x -3 lebih besar dari x

11)

F = 9/5 C + 32

77 = 9/5 C + 32

(77 – 32) × 5/9 = C

45 × 5/9 = C

25° = C