` 7xx(8+2xxy)=210`
`8+2xxy=210:7`
`8+2xxy=30`
`2xxy=30-8`
`2xxy=12`
`y=12:2`
`y = 6`
Đúng 3
Bình luận (1)
` 7xx(8+2xxy)=210`
`8+2xxy=210:7`
`8+2xxy=30`
`2xxy=30-8`
`2xxy=12`
`y=12:2`
`y = 6`
(7x-84):2- 70=210 với X/N
(x+4)+(x+6)+(x+8)+.....+(x+26) =210
Tìm x
(x+4)+(x+6)+(x+8)+...+(x+26) = 210
tim x
2+4+6+8+...+2x=210
2+4+8+....+2*x=210
Tim x
tìm b biết: 2+ 4+ 6+8+ 10 +12+......+b = 210
( x + 4 ) + ( x+ 6 ) + ( x + 8 ) + ............ + ( x + 26 ) = 210
Tìm x biết (x+4)+(x+6)+(x+8)+...+(x+26)=210
b) (AMS 2007) Tìm x biết: (𝑥 + 4) + (𝑥 + 6) + (𝑥 + 8) + ⋯ + (𝑥 + 26) = 210