Question

resolva


a) 20+ [13+(10-6)+4]

b) 52- {12+[15- (8-4)]}

c)25+ { 12+[2- (8-6)+2]}

d)65- {30-[20-(10-1+6) +1]}

e)45 + { 15- [(10-8)+ (7-4)- 3]-4}

f)40 + {50-[35- (25+5) -1]} +7

g) 38- {20- [22 -(5+3) +(7-4+1)]}

h) 26 +{12- [(30-18)+ (4-1)- 6]-1}

i)25 - [10+(7-4)]

j) 32+ [10- (9-4)+ 8]

k) 45 - [12-4+(2+1)]

l) 70- {20 - [10- (5-1)]}

m) 28 + {13 -[6- (4+1)+2] -1}

n) 53 - [20-[30- (15-1+6) +2]}

Answer 1

a) 20+ [13+(10-6)+4]
20+[13+4+4]
20+21
41

b) 52- {12+[15- (8-4)]}
52-{12+[15-4]}
52-{12+11}
52-23
29

c)25+ { 12+[2- (8-6)+2]}
25+{12+[2-2+2]}
25+{12+2}
25+14
39

d)65- {30-[20-(10-1+6) +1]}
65-{30-[20-15+1]}
65-{30-6}
65-24
41

e)45 + { 15- [(10-8)+ (7-4)- 3]-4}
45+{15-[2+3-3]-4}
45+{15-2-4}
45+9
54

f)40 + {50-[35- (25+5) -1]} +7
40+{50-[35-30-1]}+7
40+{50-4}+7
40+46+7
93

g) 38- {20- [22 -(5+3) +(7-4+1)]}
38-{20-[22-8+4]}
38-{20-18}
38-2
36

h) 26 +{12- [(30-18)+ (4-1)- 6]-1}
26+{12-[12+3-6]-1}
26+{12-9-1}
26+2
28

i)25 - [10+(7-4)]
25-[10+3]
25-13
12

j) 32+ [10- (9-4)+ 8]
32+[10-5+8]
32+13
45

k) 45 - [12-4+(2+1)]
45-[8+3]
45-11
34

l) 70- {20 - [10- (5-1)]}
70-{20-[10-4]}
70-{20-6}
70-14
56

m) 28 + {13 -[6- (4+1)+2] -1}
28+{13-[6-5+2]-1}
28+{13-3-1}
28+9
37

n) 53 - [20-[30- (15-1+6) +2]}
53-{20-[30-20+2]}
53-{20-12}
53-8
45

Answer 2

2 ( x - 2 ) + 5 ( 2 - x ) + 6 ( x + 1 ) = 0

2x - 4 + 10 - 5x + 6x + 6 = 0

2x - 5x + 6x = 0 - 6 - 10 + 4

3x = - 12

x = - 12 / 3

x = - 4