Question

Помогите плиз номер5и6 срочно!!!

Answer 1

${x}^{7} times {x}^{4} = {x}^{7 + 4} = {x}^{11}$
${( {x}^{4} )}^{8} = {x}^{8 times 4} = {x}^{32}$
$frac{ {x}^{12} }{ {x}^{4} } = {x}^{12} div {x}^{4} = {x}^{12 - 4} = {x}^{8}$
4(х-5)-(7х+9)=1
4х-20-7х-9=1
-3х=30
х=-30:3
х=-10