Question

e) 19+2(x+3)=x+48;
g) 98-3x = 53-3(x-15);
f) 3(x+18)-24 = x +78;
h) 7+3(x+11) = 3x +41.​

Answer 1

e) 19+2(x+3)=x+48

19+2x+6=x+48

x+25=48

x=23

g) 98-3x = 53-3(x-15)

98-3x=53-3x+45

98=53+45

98=98 => adevărat pentru orice x

f) 3(x+18)-24 = x +78

3x+54-24=x+78

2x+30=78

2x=48

x=24

h) 7+3(x+11) = 3x +41

7+3x+33=3x+41

7+33=41

40=41 => nu are soluție