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X-1046+1586=5473
X-1046=5473-1586
X-1046=3887
X=3887+1046
X=4933
21 : (y + 3) x4=100-88
21 : (y + 3) x4=12
21 : (y + 3)=12:4
21: (y + 3)=3
y + 3=21 : 3
y + 3=7
y=7 - 3
y=4
\(A=\left(a\text{x}7+a\text{x}8-a\text{x}15\right):\left(1+2+3+...+10\right)\)
\(A=\left(a\text{x}\left(7+8-15\right)\right):\left(1+2+3+...+10\right)\)
\(A=\left(a\text{x}0\right):\left(1+2+3+..+10\right)\)
\(A=0:\left(1+2+3+...+10\right)\)
\(A=0\)
\(B=\left(18-9\text{x}2\right)\text{x}\left(2+4+6+8+10\right)\)
\(B=\left(18-18\right)\text{x}\left(2+4+6+8+10\right)\)
\(B=0\text{x}\left(2+4+6+8+10\right)\)
\(B=0\)
1. x x 5=2805
x=2805:5
x=561
2. 1785: x =3
x=1785:3
x=595
3. 4 x x=1016
x=1016:4
x=254
B1 :
a/ x - 452 = 77 + 48
x = 125 + 452
x = 577
b/ x + 58 = 64 + 58
x = 122 - 58
x = 64
c/x - 1 – 2 – 3 – 4 = 0
x = 0 + 4 + 3 + 2 +1
x = 10
CHÚC HT
X-1046+1586=5473
X- 2632=5473
X = 5473-2632
X =2841
1475+X=7684+1542
1475+X=9226
X = 9226-1475
X = 7751
5896-X+278=202
X+278=5896-202
X+278=5694
X=5694-278
X=5416
X-845=7981-6857
X-845=1124
X=1124+845
X=1969
x - 1046 + 1586 = 5473
x- 1046 = 5473 - 1586
x - 1046 = 3887
x= 3887 + 1046
x = 4933
1475 + x = 7684 + 1542
1475 + x = 9226
x = 9226 - 1475
x = 7751
5896 - x + 278 = 202
x + 278 = 5896 - 202
x + 278 = 5694
x = 5694 - 278
x = 5416
x - 845 = 7981 - 6857
x - 845 = 1124
x = 1124 + 845
x = 1969