Respuesta :
[tex]\longrightarrow{\blue{105}}[/tex]
[tex]\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\red{:}}}}}[/tex]
[tex]3x \: (x - 2)[/tex]
Plugging in the value [tex]x\:=\:7[/tex] in the above expression, we have
➺ [tex] \: 3 \times 7 \: (7 - 2)[/tex]
➺ [tex] \: 3\times 7 \: (5)[/tex]
➺ [tex] \: 3 \times 35[/tex]
➺ [tex] \: 105[/tex]
Note:-
[tex]\sf\purple{PEMDAS\: rule.}[/tex]
P = Parentheses
E = Exponents
M = Multiplication
D = Division
A = Addition
S = Subtraction
[tex]\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{❦}}}}}[/tex]