Răspuns:
Explicație pas cu pas:
74 × 7 - m = 64
518 - m = 64
m = 518 - 64
m = 454
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c - 978 : 3 = 259
c - 326 = 259
c = 259 + 326
c = 585
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94 × 7 : m = 2
658 : m = 2
m = 658 : 2
m = 329
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596 + 242 - d = 210
838 - d = 210
d = 838 - 210
d = 628
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m : 3 = 45 rest 1
m = 45 × 3 + 1
m = 135 + 1
m = 136
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( a + 139 ) - 12 : 3 × 15 = 627
( a + 139 ) - 4 × 15 = 627
( a + 139 ) - 60 = 627
a + 139 = 627 + 60
a + 139 = 687
a = 687 - 139
a = 548
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213 - ( 230 - 5 × a ) : 7 = 183
( 230 - 5 × a ) : 7 = 213 - 183
( 230 - 5 × a ) : 7 = 30
230 - 5 × a = 30 × 7
5 × a = 230 - 210
5 × a = 20
a = 20 : 5
a = 4
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832 : a = 6 rest 4
a = ( 832 - 4 ) : 6
a = 828 : 6
a = 138
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a : 5 = 112 rest 3
a = 112 × 5 + 3
a = 560 + 3
a = 563
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10 - ( 1 + 5 : a ) × 4 = 2
1 + 5 : a = ( 10 - 2 ) : 4
1 + 5 : a = 8 : 4
1 + 5 : a = 2
5 : a = 2 - 1
a = 5 : 1
a = 5
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a - 137 × 7 + 985 = 7 000
a - 959 = 7 000 - 985
a - 959 = 6 015
a = 6 015 + 959
a = 6 974
