Question

say the correct answer plz ​​

Answer 1

Step-by-step explanation:

i) 3x+6 = 18

3x= 18- 6

3x = 12

x = 12/3

x = 4

Answer 2

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$➊3x + 6 = 18$

$evaluate \: x = - 4$

$f( - 4) = 3( - 4) + 6 = 18 \\ = > - 12 + 6 = 18 \\ = > - 6 \not = 18$

$now \: take \: x = 4$

$f(4) = 3(4) + 6 = 18 \\ = > 12 + 6 = 18 \\ = > 18 = 18$

$so \: answer \: is \: \boxed{➁x = 4}$

$➋2 - 4x = - 26$

$evaluate \: x = 7$

$f(7) = 2 - 4(7) = - 26 \\ = > 2 - 28 = - 26 \\ = > - 26 = - 26$

$so \: answer \: is \: \boxed{➀x = 7}$

$➌x - 8 = 1$

$evaluate \: x = 0$

$f(0) = 0 - 8 = 1 \\ = > - 8 \not = 1$

$now \: take \: x = 9$

$f(9) = 9 - 8 = 1 \\ = > 9 = 1$

$so \: answer \: is \: \boxed{➁x = 9}$

$➍ \frac{y}{4} + 8 = 10$

$evaluate \: x = 10$

$f(10) = \frac{ \cancel{ 10}}{ \cancel4} + 8 = 10 \\ = > \frac{5}{2} + 8 = 10 \\ take \: lcm \\ = > \frac{5 + 16}{2} = 10 \\ = > \frac{21}{2} \not = 10$

$now \: take \: x = 9$

$f(9) = \frac{ 9}{ 4} + 8 = 10 \\ = > \frac{9}{4} + 8 = 10 \\ take \: lcm \: again \\ = > \frac{9+ 32}{4} = 10 \\ = > \frac{41}{4} \not = 10$

$now \: take \: x = 8$

$f(10) = \frac{ \cancel{ 8}}{ \cancel4} + 8 = 10 \\ = > {2}+ 8 = 10 \\ = > 10 = 10$

$so \: answer \: is \: \boxed{➂x = 8}$