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Miiilkaa
@Miiilkaa
December 2021
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уровень б пожалуйста
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дик062
445.
1)12×а×5×2=120а
2)4b×25×7=700b
3)15c×9×4=540c
4)9x+7x+3x=19x
5)15y-6y+8y=17y
6)52x-16x+9x=45x
7)8(x+6)-28=8x+48-28=8x+20
8)7(2x+3)-10x=14x+21-10x=4x+21
9)4(9x+7)-26x=36x+28-26x=10x+28
446.
1)=10x
10×16=160
2)=124x
124×3=372
3)=100y
100×2=200
4)=80y+28y-100y=8y
8×6=48
447.
1)=42(19-16)+40(16-13)+38(13-10)+36(10-7)=42×3+40×3+38×3+36×3=3×(42+40+38+36)=3×156=468
2)=74(55-50)+70(50-45)+66(45-40)+62(40-35)=74×5+70×5+66×5+62×5=5×(64+70+66+62)=5×262=1310
448.
1)84a+25a+7=443
109a=443-7
109a=436
a=436÷109
a=4
2)4(9+7x)+21=393
36+28x+21=393
28x=393-57
x=336÷28
x=12
3)486÷(5x+2)=18
5x+2=486÷18
5x=27-2
x=25÷5
x=5
4)5(14+b)+6b=158
70+5b+6b=158
11b=158-70
b=88÷11
b=8
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Answers & Comments
1)12×а×5×2=120а
2)4b×25×7=700b
3)15c×9×4=540c
4)9x+7x+3x=19x
5)15y-6y+8y=17y
6)52x-16x+9x=45x
7)8(x+6)-28=8x+48-28=8x+20
8)7(2x+3)-10x=14x+21-10x=4x+21
9)4(9x+7)-26x=36x+28-26x=10x+28
446.
1)=10x
10×16=160
2)=124x
124×3=372
3)=100y
100×2=200
4)=80y+28y-100y=8y
8×6=48
447.
1)=42(19-16)+40(16-13)+38(13-10)+36(10-7)=42×3+40×3+38×3+36×3=3×(42+40+38+36)=3×156=468
2)=74(55-50)+70(50-45)+66(45-40)+62(40-35)=74×5+70×5+66×5+62×5=5×(64+70+66+62)=5×262=1310
448.
1)84a+25a+7=443
109a=443-7
109a=436
a=436÷109
a=4
2)4(9+7x)+21=393
36+28x+21=393
28x=393-57
x=336÷28
x=12
3)486÷(5x+2)=18
5x+2=486÷18
5x=27-2
x=25÷5
x=5
4)5(14+b)+6b=158
70+5b+6b=158
11b=158-70
b=88÷11
b=8