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25* {1942-8*[882 - 4 *(70 + 15 * x)]}= 150

Răspuns :

25* {1942-8*[882 - 4 *(70 + 15 * x)]}= 150
1942-8*[882 - 4 *(70 + 15 * x)]=150:25
1942-8*[882 - 4 *(70 + 15 * x)]=6
8*[882 - 4 *(70 + 15 * x)]=1942-6
8*[882 - 4 *(70 + 15 * x)]=1936
882 - 4 *(70 + 15 * x)=1936:8
882 - 4 *(70 + 15 * x)=242
4 *(70 + 15 * x)=882-424
4 *(70 + 15 * x)=640
70 + 15 * x=640:4
70 + 15 * x=160
15*x=160-70
15x=90
x=90:15
x=6
25* {1942-8*[882 - 4 *(70 + 15 * x)]}= 150
1942-8*[882 - 4 *(70 + 15 * x)]=150:25
1942-8*[882 - 4 *(70 + 15 * x)]=6
8*[882 - 4 *(70 + 15 * x)]=1942-6
8*[882 - 4 *(70 + 15 * x)]=1936
882 - 4 *(70 + 15 * x)=1936:8
882 - 4 *(70 + 15 * x)=242
4 *(70 + 15 * x)=882-242

4 *(70 + 15 * x)=640
70 + 15 * x=640:4
70 + 15 * x=160
15 * x=160-70
15 * x=90

x=90:15

x=6