Răspuns:
Explicație pas cu pas:
4×23+2×40+ a=5×33+7×51
92 + 80 + a = 165 + 357
172 + a = 522
a = 522 - 172 = 350
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3×24+2×69+a=8×47+4×51
72 + 138 + a = 276 + 204
210 + a = 480
a = 480 - 210 = 270
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6×36+9×12+a=9×41+7×45
216 + 108 + a = 369 + 315
324 + a = 684
a = 684 - 324 = 360
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3×(16-4+22)+2×(18-5+23)+5×(11+3+25)=
3 x 34 + 2 x 36 + 5 x 39 = 102 + 72 + 195 = 369
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(15-11+13)×6+(38-12-13)×3+(46-13-12)×4=
17 x 6 + 13 x 3 + 21 x 4 = 102 + 39 + 84 = 225
