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\(72+\left(150+x\right).4=100\)
\(\left(150+x\right).4=100-72=28\)
\(150+x=28:4=7\)
\(x=7-150=-143\)
150 + x * 4 = 100 - 72 = 28
150 + x = 28 : 4
150 + x = 7
x = 150 - 7
x = 143
72 - (150 + x) : 4 = 100
(150 + x) : 4 = 72-100
(150 + x) : 4 = -28
150 + x = -28.4
150 + x = -112
x = -112-150
x = -262
72 + (150 +x) *4 = 100
(150 +x) *4 = 100 - 72
(150+x) *4 = 28
150 +x = 28 :4
150 +x = 7
x= 150 -7
x=143
72+(150+x).4=100
\(\Rightarrow\)72+600+4x=100
\(\Rightarrow\)672+4x=100
\(\Rightarrow\)4x=100-672
\(\Rightarrow\)4x=-572
\(\Rightarrow\)x=-143
D) \(\left(72^4+72^5\right)\div72^4\)
\(=72^4\div72^4+72^5\div72^4\)
\(=1+72\)
\(=73\)
E)\(\left(3^{15}.4+5.3^{15}\right)\div3^{16}\)
\(=\text{[}3^{15}.\left(4+5\right)\text{]}\div3^{16}\)
\(=\left(3^{15}.9\right)\div3^{16}\)
\(=\left(3^{15}.3^2\right)\div3^{16}\)
\(=3^{17}\div3^{16}\)
\(=3\)
a/ 1000 - 47 x 72 - 47 x 28
= 1000 - 47 x (72 + 28)
= 1000 - 47 x 100
= 1000 - 4700
= -3700
b/ 3457 - 27 x 48 - 48 x 73 + 6543
= 3457 - 48 x (27 + 73) + 6543
= (3457 + 6543) - 48 x 100
= 10000 - 4800
= 5200
k mk nha, mk trả lời đầu tiên đấy
\(1000-\left(x-\frac{1}{2}\right):5=5:4\frac{2}{3}\)
\(1000-5:\frac{14}{3}=\left(x-\frac{1}{2}\right):5\)
\(\frac{13985}{14}=\left(x-\frac{1}{2}\right):5\)
\(x-\frac{1}{2}=\frac{69925}{14}\)
\(x=\frac{34966}{7}\)
\(1000-\left(x-\frac{1}{2}\right):5=5:4\frac{2}{3}\)
\(1000-\left(x-\frac{1}{2}\right):5=\frac{15}{14}\)
\(\left(x-\frac{1}{2}\right):5=1000-\frac{15}{14}\)
\(\left(x-\frac{1}{2}\right):5=\frac{13985}{14}\)
\(\left(x-\frac{1}{2}\right)=\frac{13985}{14}\cdot5\)
\(x-\frac{1}{2}=\frac{69925}{14}\)
\(x=\frac{69925}{14}+\frac{1}{2}\)
\(x=\frac{34966}{7}\)
72+(150-x)=1000/4=250
150-x=250-72=178
x=150-178=-28
ung ho nha
72 + (150 -x) .4=1000
=> (150 -x) .4= 928
=> 150 - x = 232
=> x = -82
Vậy X là -82.