230 - X x 3 = 50
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\(60+x-34=43\Rightarrow x=43+34-60=17\)
\(23x-6.23+69x=230\)
\(\Rightarrow23x+69x=230+6.23\)
\(\Rightarrow92x=368\Rightarrow x=368:92\Rightarrow x=4\)
\(\left(15.24-x\right):0,25=100:0,25\)
\(\Rightarrow\left(360-x\right)=100:0,25.0,25\)
\(\Rightarrow360-x=100\Rightarrow x=360-100=260\)
\(\left(7x+8\right):5=10\Rightarrow\left(7x+8\right)=10.5\)
\(\Rightarrow7x+8=50\Rightarrow7x=50-8\Rightarrow7x=42\Rightarrow x=42:7=6\)
\(280:\left(7+3x\right)=4\Rightarrow\left(7+3x\right)=280:4\)
\(\Rightarrow7+3x=70\Rightarrow3x=70-7\Rightarrow3x=63\Rightarrow x=63:3=21\)
\(\left(x+5\right)x19:13=57\)
\(\Rightarrow\left(x+5\right)x19=57.13\)
\(\Rightarrow\left(x+5\right)=741:19\Rightarrow x+5=39\Rightarrow x=39-5=34\)
\(4\left(36-4x\right)=64\)
\(\Rightarrow\left(36-4x\right)=64:4\)
\(\Rightarrow36-4x=16\)
\(\Rightarrow4x=36-16\Rightarrow4x=20\Rightarrow x=20:4=5\)
\(\left(7,6:1,9\right)x=3,2\)
\(\Rightarrow4x=3,2\Rightarrow x=3,2:4=0,8\)
\(\left(x:2+50\right):5=12\)
\(\Rightarrow x:2+50=12.5\)
\(\Rightarrow x:2=60-50\Rightarrow x:2=10\Rightarrow x=10.2=20\)
(-50) + (230) + (-45) + 230
= [(-50) + 230] + [(-45) + 230)
= 180 + 185
= 365
=
=
= 7 x ( 2 x230) + 7 x 540
= 7 x 460 + 7 x 540
= 7 x ( 460 + 540)
= 7 x 1000
= 7000
(3 - x)(y + 4) = 0
=> 3 - x = 0 hoặc y + 4 = 0
=> x = 3 hoặc y = -4
kl_
260-709-181+(-360)
=(260-360)-(709+181)
=-100-890=-990
\(230-x\times3=50\)
\(x\times3=230-50\)
\(x\times3=180\)
\(x=180:3\)
\(x=60\)
Vậy \(x=60\)
230 - X x 3 = 50
X x 3 = 230 - 50
X x 3 = 180
X = 180 : 3
X = 60